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Money & work27 toolsPercentage calculator · VAT calculator · Discount calculatorEveryday life24 toolsTip and bill splitter · Trip fuel cost calculator · Electricity cost calculatorHealth & fitness16 toolsBMI calculator · Daily calorie needs · Running pace calculatorCooking & nutrition10 toolsCooking measurement converter · Recipe scaler · Roast cooking timeDates & time15 toolsAge calculator · Days between dates · Add days to a dateMath16 toolsRule of three calculator · Average calculator · GCD and LCM calculatorScience & physics10 toolsOhm's law calculator · Dilution calculator · Molar mass calculatorBelgium & France21 toolsBelgium gross to net salary · France gross to net salary · Belgium property registration feesStudies21 toolsWeighted average calculator · Grade needed on the exam · Grade converterBusiness & pro62 toolsBreak-even calculator · Total employee cost for the employer · Return on investmentGames & gaming29 toolsDice roller · Coin flip · Random team generatorCode & web32 toolsBinary, decimal, hex converter · Password generator · Password strength checkerConverters17 toolsLength converter · Weight converter · Temperature converterShow all300 toolsEvery tool, every category

Money & work

Percentage calculatorWork out a percentage of a number, what percent one value is of another, or the change between two values.Open →
VAT calculatorAdd or remove VAT from a price with common European rates or your own rate.Open →
Discount calculatorFind the sale price and how much you save, including stacked discounts.Open →
Loan payment calculatorCalculate the monthly payment, total cost and total interest of a car, personal or home loan.Open →
Compound interest calculatorSee what your savings can grow to over time with monthly contributions.Open →
Hourly to salary converterConvert an hourly wage into weekly, monthly and yearly pay, or the other way round.Open →
Profit margin calculatorGet profit, margin and markup from your cost and selling price.Open →
Savings goal calculatorFind out how long it takes to reach a goal and how much to save each month.Open →
Inflation calculatorWhat your money will be worth in X years, or how much you'll need to buy the same thing.Open →
Borrowing capacityHow much can you borrow for a home based on your income?Open →
Rental yield calculatorGross and net yield of a rental property, plus monthly cash flow.Open →
Freelance day rateWhat day or hourly rate to charge to reach your target income as a freelancer?Open →
Split expenses between friendsWho owes whom after a trip or a night out? The fewest payments to settle up.Open →
50/30/20 budgetSplit your income: 50% needs, 30% wants, 20% savings. And compare with what you really spend.Open →
Debt payoff calculatorHow many months to pay off a loan, card or overdraft, and how much interest you'll pay.Open →
Financial independence (FIRE, 4% rule)The nest egg you need to live off your investments, and how many years until you get there.Open →
Impact of fees on an investmentWhat 1% or 2% yearly fees really cost you over 10, 20 or 30 years.Open →
Salary raise calculatorYour new salary after a raise, and what it's really worth once inflation is taken out.Open →
Emergency fund calculatorHow much to keep aside for a rainy day, and how long it will take to get there.Open →
Subscription cost calculatorAdd up Netflix, Spotify, gym, phone… and see what it adds up to per year and over 10 years.Open →
Compare two loan offersRate, term, fees: which loan offer really costs less?Open →
Loan overpayment calculatorWhat you save by paying off part of your loan early, penalties included.Open →
Rent vs buy calculatorCompare your wealth after X years if you buy, or rent and invest the difference.Open →
APR calculator (true cost of credit)The real annual percentage rate of a loan or instalment plan, fees included.Open →
How many hours of work does it cost?Turn a price into hours and days of your work, to see if it's really worth it.Open →
Rule of 72: time to double your moneyHow many years to double (or triple) an investment at a given return, and the reverse.Open →
Dividend yield calculatorThe dividend yield, the yearly income after withholding tax and how long to earn back your stake.Open →

Everyday life

Tip and bill splitterWork out the tip and what each person pays.Open →
Trip fuel cost calculatorEstimate the fuel cost of a trip and the cost per passenger.Open →
Electricity cost calculatorWhat a PC, heater or console costs to run per day, month and year.Open →
Area calculator (m²)Area and perimeter of a room, a garden or a wall, plus paint needed.Open →
Random number generatorPick one or more random numbers between two values, with or without repeats.Open →
Unit price comparisonBig pack or small pack? Find which product is cheaper per kilo or litre.Open →
Robux to euro converterWhat Robux cost to buy, and what they earn a creator through DevEx.Open →
Electric vs petrol car costCompare the energy cost of an electric and a petrol car over your mileage.Open →
Tile and flooring calculatorHow many tiles or boxes of flooring to buy for a room, including waste.Open →
Dog and cat age in human yearsHow old would your pet be if it were human?Open →
Car fuel consumptionWork out your real L/100 km after filling up, and the cost per kilometre.Open →
Paint calculatorHow much paint and how many tins you need for a room, minus doors and windows.Open →
Concrete calculatorHow much concrete for a slab, patio or footing, and how many bags to buy.Open →
Shower water usageHow much water and money your showers use per year, and what a shorter shower would save.Open →
TV size and viewing distanceReal width and height of a screen in inches, and the right distance to watch it from.Open →
Fair rent split by incomeA fair way to split rent and bills between partners or roommates, based on what each person earns.Open →
LED bulb savingsHow much you save by switching bulbs, and how quickly the LEDs pay for themselves.Open →
Moving volume calculatorEstimate how much stuff you have and which van size to rent.Open →
Heating cost by energy typeGas, oil, pellets, heat pump or electric: what does your heating cost per year?Open →
Solar panel payback calculatorWhat your system produces, how much it saves you and how many years until it pays for itself.Open →
Pool volume calculatorWater volume, filling cost and chlorine dose for a rectangular, round or oval pool.Open →
Tyre size calculatorDiameter and circumference of a tyre (e.g. 205/55 R16), and the speedometer error if you change size.Open →
EV charging time and costHow long to charge from 20 to 80% depending on the charger, and what it costs.Open →
Compare two energy tariffsUnit price and standing charge: which tariff is cheapest for your usage?Open →

Health & fitness

BMI calculatorCalculate your body mass index and its category (adults).Open →
Daily calorie needsEstimate your basal metabolic rate and daily calories for your activity level.Open →
Running pace calculatorTurn a distance and time into pace (min/km) and speed (km/h).Open →
Sleep calculatorWhen to go to bed to wake up refreshed, based on 90-minute sleep cycles.Open →
Daily water intakeEstimate how much water to drink based on your weight, exercise and heat.Open →
Heart rate zonesYour maximum heart rate and training zones (endurance, cardio, threshold).Open →
Body fat calculatorEstimate your body fat percentage with a tape measure (US Navy method).Open →
Pregnancy due dateEstimate the due date and week of pregnancy from the last period.Open →
Ideal weight calculatorYour ideal weight according to classic medical formulas, compared with the BMI range.Open →
Blood alcohol estimateAn estimate of your blood alcohol level and how long until it's back to zero. Never a substitute for a breathalyser.Open →
Calories burned by activityHow many calories you burn walking, running, swimming, cycling or lifting weights.Open →
Cooper test and VO2maxYour VO2max and fitness level from the distance you run in 12 minutes.Open →
Race time predictorFrom a recent race time, estimate your 5K, 10K, half marathon and marathon times.Open →
Waist-to-height and waist-to-hip ratioTwo simple measures of belly fat, often more telling than BMI.Open →
Steps to km and caloriesConvert your steps into distance and calories, and see what 10,000 steps represents.Open →
Ovulation calculatorEstimate your ovulation date, fertile window and next period.Open →

Cooking & nutrition

Cooking measurement converterCups, spoons, millilitres and grams: convert recipe measurements.Open →
Recipe scalerRescale every ingredient of a recipe for 2, 6 or 20 people.Open →
Roast cooking timeHow long in the oven based on weight, type of meat and how you like it.Open →
Macro calculator (protein, carbs, fat)How many grams of protein, carbs and fat to eat per day based on your calories and goal.Open →
Egg boiling timeSoft, medium or hard-boiled: the exact time based on size and whether it's straight from the fridge.Open →
Food quantities per personHow much pasta, rice, meat or veg to plan for a meal, barbecue or party.Open →
Oven temperature converterConvert recipe temperatures between Celsius, Fahrenheit, French thermostat and Gas Mark, fan oven included.Open →
Baker's percentage calculatorThe amounts of water, salt and yeast for your bread from the flour weight and hydration.Open →
Recipe calorie calculatorAdd up the calories of a recipe's ingredients and divide by the number of servings.Open →
Coffee to water ratio calculatorHow many grams of coffee for your brewing method: filter, French press, espresso, cold brew…Open →

Dates & time

Age calculatorYour exact age in years, months and days, and how many days until your birthday.Open →
Days between datesCount the days, weeks and weekdays between two dates.Open →
Add days to a dateFind the date X days, weeks or months from a given date.Open →
Hours worked calculatorTime between a start and end time minus breaks, in hours and decimal hours.Open →
Time zone converterWhat time is it in New York, Tokyo or Montreal when it's 3 pm in London?Open →
Countdown calculatorHow many days until the holidays, Christmas, a birthday or an exam?Open →
Week number and weekdayThe ISO week number, weekday and day of the year for any date.Open →
Your age on other planetsHow old would you be on Mars, Jupiter or Mercury?Open →
Working days between dates (with holidays)The number of working days between two dates, excluding weekends and Belgian or French public holidays.Open →
Public holidays and Easter dateThe list of public holidays in Belgium or France for any year, with the day of the week.Open →
Add up hours and durationsAdd up durations (1h30, 2:45, 50 min…) for a timesheet or a video edit.Open →
Duration converter (decimal hours ↔ h:min)Convert seconds, minutes, hours, days and decimal hours (7.75 h = 7 h 45).Open →
Life milestones (10,000 days, 1 billion seconds)The dates of your 10,000th day, 500th month or 1 billionth second, and the weekday you were born.Open →
Moon phase calculatorThe Moon's phase and illumination on any date, with the next full and new moons.Open →
Weekly timesheetYour hours for the week day by day, minus breaks, and overtime beyond your contract.Open →

Math

Rule of three calculatorSolve a proportion: if A gives B, what does C give?Open →
Average calculatorMean, median, minimum, maximum and sum of a list of numbers.Open →
GCD and LCM calculatorGreatest common divisor and least common multiple of several numbers.Open →
Fraction calculatorAdd, subtract, multiply or divide two fractions, with a simplified result.Open →
Roman numeral converterConvert numbers to Roman numerals and back (1 to 3999).Open →
Quadratic equation solverSolve ax² + bx + c = 0: discriminant, roots and vertex of the parabola.Open →
Pythagorean theorem calculatorFind the missing side of a right triangle, its area and angles.Open →
Area and volume of shapesCircle, sphere, cylinder, cone, cube: area, perimeter and volume.Open →
Prime checker and factorizationCheck whether a number is prime and break it into prime factors.Open →
Powers, roots and logarithmsx to the power n, square and nth roots, logarithms and scientific notation in one place.Open →
System of two equations solverSolve ax + by = c and dx + ey = f, with the steps (Cramer's rule).Open →
Rounding calculatorRound to nearest, down or up, to n decimal places or n significant figures.Open →
Combinations and permutationsHow many ways to choose k items from n, with or without order or repetition.Open →
Trigonometry calculatorsin, cos, tan of an angle in degrees or radians, and the inverse functions.Open →
Arithmetic and geometric sequencesThe nth term and the sum of a sequence, with the first terms listed.Open →
Decimal to fraction converterTurn 0.375 into 3/8 or 0.333… into 1/3, with the simplified fraction and percentage.Open →

Science & physics

Ohm's law calculatorEnter any two of V, I, R and P and get the other two.Open →
Dilution calculator (C1V1 = C2V2)How much stock solution to take to get the concentration you want.Open →
Molar mass calculatorThe molar mass of a chemical formula (H2O, C6H12O6, Ca(OH)2…) with the mass composition.Open →
Free fall calculatorHow long an object takes to fall and how fast it hits the ground, without air resistance.Open →
Kinetic and potential energyThe energy of a moving or raised object, in joules, kilojoules and kWh.Open →
Resistor colour code calculatorThe value of a 4 or 5-band resistor from its colours.Open →
Wavelength, frequency and photon energyConvert frequency and wavelength (light, radio, sound) and find the photon energy.Open →
Half-life calculatorThe amount remaining after a given time, or the age of a sample (carbon-14 dating).Open →
pH calculatorGo from pH to H₃O⁺ concentration (and back), with pOH and whether the solution is acidic or basic.Open →
Your weight on other planetsHow much you'd "weigh" on the Moon, Mars, Jupiter and the rest of the Solar System.Open →

Belgium & France

Belgium gross to net salaryEstimate your monthly take-home pay as an employee in Belgium from your gross salary (2026 scale).Open →
France gross to net salaryConvert French gross pay to net, before and after income tax withholding, by job status.Open →
Belgium property registration feesWhat buying a home costs in taxes and fees in Wallonia, Brussels or Flanders.Open →
France notary feesEstimate French notary fees for buying an existing or a new-build property.Open →
Belgium rent indexationCalculate the indexed rent with the health index, as allowed by a Belgian lease.Open →
Legal severance pay (France)The legal minimum an employer must pay on dismissal (except gross misconduct), based on length of service.Open →
Notice period (Belgium)The legal notice in weeks when you're dismissed or resign, based on length of service (single status).Open →
Income tax (France)An estimate of your income tax with the progressive scale and family quotient.Open →
Personal income tax (Belgium)An estimate of federal and municipal tax on your net taxable income.Open →
Unemployment benefit ARE (France)An estimate of your daily and monthly benefit based on your previous salary.Open →
Holiday pay (Belgium, white-collar)The double holiday pay you'll receive, based on your salary and months worked last year.Open →
Mileage allowance scale (France)Your deductible car expenses based on distance driven and fiscal horsepower.Open →
Paid leave pay (France)Compare the 1/10 rule and salary maintenance: the more favourable one applies.Open →
Childcare and home help tax credit (France)What the state gives back on daycare, nanny, cleaning or gardening costs.Open →
Commuting allowance (Belgium)Bike allowance, public transport refund or car mileage: what you get per year.Open →
Meal vouchers (Belgium and France)What your meal vouchers are worth per month and per year, employer and employee share.Open →
Property capital gains tax (France)The tax on the gain when selling a property that isn't your main home, with holding-period allowances.Open →
Micro-entrepreneur contributions (France)Your social contributions and what's left of your micro-business revenue.Open →
Salary indexation (Belgium)Your new gross salary after your joint committee's automatic indexation.Open →
Tenant notice period (Belgium/France)How much notice to give your landlord, when the lease ends and any compensation owed.Open →
Statutory leave days (Belgium)How many days off you get this year based on months worked last year and your schedule.Open →

Studies

Weighted average calculatorCalculate a weighted average of grades with their weights.Open →
Grade needed on the examFind the exam grade you need to pass or reach your target grade.Open →
Grade converter (/20, %, GPA)Convert a grade between /20, /10, /100, percentage, Belgian and French honours and US GPA.Open →
ECTS credits and year averageCalculate your credit-weighted average, credits passed and workload.Open →
Revision plannerHow many hours to study per day and per subject before the exam.Open →
GPA calculator (4.0 scale)Your GPA from letter grades (A, B+, C…) and credits, for an exchange or an application.Open →
Speech length calculatorHow long your text takes to say out loud, and how many words to write for 5, 10 or 20 minutes.Open →
Pomodoro plannerSplit a work session into pomodoros and see what time you'll be done.Open →
French baccalauréat grade simulatorYour average at the French general bac with the official weightings, and the honours you'd get.Open →
University honours (Belgium / France)The honours your average gets you in Belgium and France, and how far you are from the next one.Open →
Multiple-choice test score (negative marking)Your score on a multiple-choice test with penalties for wrong answers, and whether guessing pays off.Open →
Monthly student budgetRent, food, transport, going out: see where your month's budget goes.Open →
Typing speed (WPM)Work out your typing speed and accuracy from a test.Open →
Words to pages converterHow many pages your text will be, or how many words you need to fill the required pages.Open →
Spaced repetition scheduleThe best dates to review a subject so you don't forget it (forgetting curve).Open →
APA 7 citation generatorFormat a source (book, article, website) in APA style for your reference list.Open →
Attendance calculatorYour attendance rate, and how many more hours you can miss without going over the limit.Open →
Book reading time calculatorHow many hours to read a book, and when you'll finish it at your pace.Open →
Flashcard study plannerHow many new cards to learn per day to cover everything before the exam, reviews included.Open →
ECTS workload calculatorHow many hours of work your ECTS credits represent, in total and per week.Open →
Essay word count plannerSplit your essay, thesis or report word count between the introduction, sections and conclusion.Open →

Business & pro

Break-even calculatorHow many units to sell to cover fixed costs, and when you start making money.Open →
Total employee cost for the employerFrom gross salary to the real cost for the company: employer contributions, bonuses, benefits.Open →
Return on investment (ROI)The ROI of a campaign, a machine or a project, and its yearly return.Open →
Selling price from target marginWhat price to charge to get the margin you want, before and after VAT.Open →
Invoice and quote calculatorAdd up your lines (quantity × price), apply a discount and VAT: net, VAT and total.Open →
Compound annual growth rate (CAGR)The average yearly growth of revenue, an audience or an investment.Open →
Customer lifetime value (LTV) and CACWhat a customer is worth over their lifetime, and how much you can spend to acquire one.Open →
Conversion rate and revenueVisitors, leads, sales: your conversion rates and revenue per visitor.Open →
Late payment interestWork out interest and the flat compensation due on an unpaid business invoice.Open →
Straight-line depreciationThe depreciation schedule of a computer, a vehicle or a machine.Open →
Reorder point and safety stockWhen to reorder a product and how many, so you never run out.Open →
Payback periodHow long until solar panels, a machine or software pay for themselves?Open →
Meeting cost calculatorWhat this meeting really costs, once, per week and over a year?Open →
Invoice due dateNet 30, net 60, end of month… work out an invoice's payment deadline.Open →
Simple profit and lossFrom revenue to net profit: gross margin, EBITDA, operating profit.Open →
Online payment fees (Stripe, PayPal…)How much you really receive after fees, and what to charge to get the amount you want.Open →
Net Promoter Score (NPS)Measure customer loyalty from 0–10 survey answers.Open →
Maximum discount you can giveHow far can you cut the price without going below your minimum margin?Open →
Break-even dateOn which day of the year have your sales covered all your fixed costs?Open →
Working capital requirementHow much cash is tied up in stock and customer and supplier payment terms.Open →
Days sales outstanding (DSO)How many days, on average, your customers take to pay you.Open →
Inventory turnoverHow many times a year your stock turns over, and how many days it sits on the shelf.Open →
Revenue per employeeTeam productivity: revenue, margin and profit per employee.Open →
Employee turnover rateThe share of employees who leave over the year, and what it costs.Open →
Absenteeism rateThe share of working time lost to absence, and its cost to the company.Open →
Overtime pay calculatorWhat overtime hours earn or cost at a premium rate.Open →
Prorated salary (partial month)The pay due when someone joins or leaves mid-month, or works part-time.Open →
Sales commission calculatorA salesperson's commission with a rate, a target and an overachievement bonus.Open →
Volume discount pricingTotal and unit price of an order using tiered volume discounts.Open →
Online ads: CPM, CPC, CTR, ROASAnalyse a Google, Meta or TikTok campaign: cost per click, per sale and return on ad spend.Open →
Occupancy rate and RevPARFor a hotel, holiday let or Airbnb: occupancy, average rate and revenue per available room.Open →
Subscriptions: MRR, ARR and churnMonthly and annual recurring revenue, and subscribers in 12 months given your churn.Open →
Lease or buy?Compare the total cost of leasing and buying on credit for a vehicle or equipment.Open →
VAT payable (VAT return)VAT collected on sales minus VAT paid on purchases: how much to pay the tax office?Open →
Restaurant food costA dish's food cost as a share of its selling price, and the price to charge for a target ratio.Open →
Business valuation (EBITDA multiple)A quick estimate of a small business's value from its EBITDA and debt.Open →
Burn rate and runwayHow many months your company can last on its current cash.Open →
Sales forecast (trend)Extend the trend of your past sales to estimate the coming months.Open →
Price change impactYour profit after a price change, and how many customers you can lose without losing money.Open →
Billable utilization rateThe share of your time that's actually billed, and the revenue hidden in unbilled hours.Open →
CAC and payback periodWhat a new customer costs you, and how many months it takes to earn that back.Open →
Liquidity ratiosCan your business pay its short-term debts? Current, quick and cash ratios.Open →
Debt ratio and solvencyHow much debt your business carries and how able it is to repay it.Open →
Profitability: ROE, ROA and net marginWhat shareholders' money and the company's assets earn.Open →
Sales target breakdownTurn a yearly target into sales, customers and visitors per day.Open →
Product cost calculatorMaterials, labour, overheads and packaging: the real cost of one unit and the price to charge.Open →
Employee vs freelancer costCompare the yearly cost of hiring with that of a freelancer for the same work.Open →
E-commerce order profitabilityWhat you really keep on an order after product, shipping, payment fees, ads and returns.Open →
Weighted average inventory costThe weighted average unit cost of your purchases and the value of your stock.Open →
Takt time calculatorThe production pace needed to meet demand, and how many operators you need.Open →
Early payment discountShould you pay early to get a discount (e.g. 2/10 net 30)? The equivalent annual rate tells you.Open →
Trade show ROIBooth, travel, staff: what each lead costs and what the event brings in.Open →
Office cost per deskRent, service charges, energy: what one desk costs per month and per m².Open →
Full-time equivalent (FTE)Convert your team's hours (part-timers included) into full-time equivalents.Open →
Budget vs actual varianceCompare budget and actual figures line by line, with variances in %.Open →
Weighted sales pipelineThe likely revenue from deals in progress, weighted by their chance of closing.Open →
Pass a cost increase on to pricesThe new price to charge to keep your margin when suppliers raise theirs.Open →
Project quote estimatorAdd up tasks in days, add a contingency buffer and get a project price before and after tax.Open →
Marketing budget calculatorHow much to invest in marketing based on your revenue and stage, and how to split it.Open →
Defect rate, DPMO and sigma levelYour production quality: scrap rate, defects per million and Six Sigma level.Open →
OEE calculator (overall equipment effectiveness)Availability × performance × quality: the real efficiency of a machine or production line.Open →
Team bonus splitSplit a bonus pool between team members, equally, by salary or by score.Open →

Games & gaming

Dice rollerRoll any dice (2d6, 1d20, 4d8+3…) for board games and tabletop RPGs.Open →
Coin flipFlip a coin (or a hundred) to settle a decision in one click.Open →
Random team generatorSplit players randomly into even teams for sports, school or games.Open →
Random name pickerPick a winner, a speaking order or who does the dishes, at random.Open →
K/D ratio and win rateWork out your K/D, KDA and win percentage (Fortnite, Valorant, CoD, LoL…).Open →
FPS and frame timeConvert frames per second to milliseconds per frame and compare with your monitor (Hz).Open →
Level-up time calculatorHow many games and hours of play to reach your target level, rank or battle pass tier.Open →
Username generatorFind a username for Roblox, Fortnite, Discord or Twitch from a word you like.Open →
Rock paper scissorsPlay against the computer: pick your move and play the round.Open →
Lottery number generatorA random line for EuroMillions, French or Belgian Lotto, and your odds of winning.Open →
Elo rating calculatorYour new Elo rating after a game, and your chances of winning.Open →
DPS calculatorAverage damage per second of a weapon or build, critical hits included.Open →
Drop rate calculatorYour chances of getting a rare item after X tries, and how many tries to be almost sure.Open →
Card draw probability (hypergeometric)Your chances of having a specific card in your opening hand or after a few turns.Open →
Tournament calculatorHow many matches, rounds and byes to run your tournament.Open →
Mouse sensitivity: cm/360 and game converterKeep exactly the same aim when switching between CS2, Valorant, Apex, Overwatch or Fortnite.Open →
Cost per hour of gamingIs a game, console or subscription worth it? Work out the cost per hour played.Open →
Ping and server distanceThe lowest possible latency to a server based on distance, and what your ping means in frames.Open →
Minecraft Nether ↔ Overworld coordinatesWhere to build your Nether portal so it leads to the right place.Open →
Minecraft stack calculatorConvert a number of blocks into stacks of 64, chests and Shulker boxes.Open →
Magic 8 ballAsk a question and the magic ball answers. For when you can't decide (no guarantees!).Open →
Truth or dare generatorFamily-friendly questions and dares to liven up a night with friends.Open →
Poker odds with outsYour chances of hitting your draw on the turn or river, and whether calling is profitable.Open →
Darts checkout calculator (501)How to finish a 501 game in 3 darts or fewer, ending on a double.Open →
Bowling score calculatorWork out a bowling score from the throws, strikes and spares included.Open →
Pokémon type effectivenessThe damage multiplier of a move against a single or dual-type Pokémon.Open →
Streaming bitrate calculatorThe right video bitrate for your resolution, FPS and connection, and the size of a recording.Open →
D&D ability score generator (4d6 drop lowest)Roll the 6 ability scores of a Dungeons & Dragons character, with modifiers.Open →
Chess time per moveHow much time you can spend on each move for a given time control (blitz, rapid, classical).Open →

Code & web

Binary, decimal, hex converterConvert a number between binary, octal, decimal and hexadecimal.Open →
Password generatorCreate a strong random password, generated in your browser and never sent anywhere.Open →
Password strength checkerHow long would it take to guess your password? (nothing is sent)Open →
HEX, RGB, HSL color converterConvert a color between HEX, RGB and HSL, with a preview and shades.Open →
Color contrast checkerCheck whether text is readable on its background under WCAG accessibility rules.Open →
Word and character counterWords, characters, sentences and reading time of a text (essay, post, bio…).Open →
Text case converterTurn text into UPPERCASE, lowercase, Title Case, camelCase, snake_case or kebab-case.Open →
Base64 encoder / decoderEncode text to Base64 or decode a Base64 string, including accents and emoji.Open →
URL encoder / decoderEncode spaces and special characters in a link, or make an encoded link readable.Open →
Unix timestamp converterTurn a Unix timestamp into a readable date, or a date into a timestamp.Open →
UUID generatorGenerate unique UUID v4 identifiers for databases and projects.Open →
Aspect ratio calculatorFind the aspect ratio (16:9, 4:3…) of an image or video, and the right height for a new width.Open →
JSON formatter and validatorPretty-print, minify and validate JSON. The error is pinpointed if it's invalid.Open →
Regex testerTest a regular expression against text: matches, positions and captured groups.Open →
SHA-256 hash generatorThe SHA-256 fingerprint of a text, to check integrity or compare values.Open →
Lorem ipsum generatorPlaceholder text for your mockups: paragraphs, sentences or an exact word count.Open →
URL slug generatorTurn a title into a clean web address: no accents, no spaces, lowercase.Open →
Text diff checkerFind lines added, removed or unchanged between two versions of a text.Open →
Cron expression explainerTranslate a cron expression into plain English and see its next 5 runs.Open →
Chmod calculatorConvert an octal code (755) to readable permissions (rwxr-xr-x) and back.Open →
IPv4 subnet calculator (CIDR)Network address, broadcast, mask and number of hosts from an IP and prefix.Open →
JWT decoderRead the header and payload of a JWT, with its expiry date. Nothing is sent anywhere.Open →
HTML entity encoder / decoderEscape <, >, & and quotes to show them in a web page, or decode entities.Open →
CSV to JSON converterTurn a CSV table (Excel, Google Sheets) into JSON, with separator detection.Open →
px to rem converterConvert pixels to rem (and back) for accessible CSS.Open →
CSS gradient generatorCreate a linear or radial gradient and copy the ready-to-use CSS.Open →
Text to ASCII / Unicode codesDecimal, hex, binary and UTF-8 codes for every character in a text.Open →
CSS minifierShrink a stylesheet by removing comments, spaces and line breaks.Open →
Markdown to HTML converterTurn Markdown (headings, bold, lists, links, code) into clean HTML.Open →
IBAN validatorCheck that an IBAN is well-formed (check digits) and format it in groups of 4. Nothing is sent anywhere.Open →
Colour palette generatorComplementary, analogous, triadic colours and shades from a base colour.Open →
SMS character counterHow many SMS your text will use, depending on GSM or Unicode encoding (emojis, accents).Open →

Converters

Length converterConvert between meters, centimeters, kilometers, inches, feet and miles.Open →
Weight converterConvert between kilograms, grams, pounds, ounces and stones.Open →
Temperature converterConvert between Celsius, Fahrenheit and Kelvin.Open →
Speed converterkm/h, mph, m/s and knots, plus the time to cover 100 km.Open →
File size and download timeConvert MB, GB, TB and work out download time for your connection speed.Open →
Volume converterLitres, millilitres, m³, US and UK gallons, pints and fluid ounces.Open →
Area unit converter (m², ha, acres)Convert square metres, ares, hectares, km², square feet and acres.Open →
Shoe size converter (EU, US, UK)Convert a European shoe size to US or UK, and back.Open →
Pressure converter (bar, PSI)Tyres, weather or diving: convert bar, PSI, kPa, atm and mmHg.Open →
Energy converter (kWh, kcal, joules)Convert kWh, joules, calories and BTU, for electricity, heating or nutrition.Open →
Number to wordsWrite a number or amount out in words, in English or French (with Belgian variants).Open →
Power converter (kW, hp, W)Convert engine or appliance power between kW, horsepower and watts.Open →
Fuel economy converter (L/100 km ↔ mpg)Compare the fuel economy of American, British or European cars.Open →
Clothing size converter (EU, US, UK)Find your clothing size in the European, US, UK and Italian systems.Open →
Angle converter (degrees, radians, gradians)Convert an angle between degrees, radians, gradians, turns and arcminutes, with degrees-minutes-seconds format.Open →
Paper sizes in cm, inches and pixelsExact dimensions of A, B and US paper sizes, and their size in pixels for printing.Open →
Ring size converterFind your ring size from your finger circumference, and its US, UK and diameter equivalents.Open →
ChartsLoans, savings and salaries also come as curves and pie charts.
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Instant searchCtrl + K or / to find a tool by typing two letters.