All tools
Hundreds of free tools across math, converters, date, text, developer, SEO, generators, health, business, image and live-data categories — all running in your browser, no sign-up.
64 tools · updated continuously
Math10
mathAverage CalculatorFind the mean, sum and count of any list of numbersmathFraction CalculatorAdd, subtract, multiply and divide fractions with simplified resultsmathPercentage CalculatorPercentage of a number, what percent one value is of another, and percentage changemathPercentage Decrease CalculatorCalculate the percent drop between two values, or the increase if it rosemathPercentage Difference CalculatorCompare two numbers as a percent difference based on their averagemathPercentage Increase CalculatorFind the percent increase between two values and the amount addedmathProbability CalculatorTurn favorable and total outcomes into a probabilitymathRatio CalculatorSimplify a ratio and solve missing ratio valuesmathStandard Deviation CalculatorMeasure how spread out your numbers are, population or samplemathWeighted Average CalculatorCompute an average where some values matter more than others
Converters10
convertersArea ConverterConvert square meters, feet, acres, hectares and moreconvertersData Storage ConverterConvert bits, bytes, KB, MB, GB, TB and PBconvertersEnergy ConverterConvert joules, kilocalories, watt-hours, kWh and BTUconvertersLength ConverterConvert between millimeters, centimeters, meters, inches, feet, yards and milesconvertersPressure ConverterConvert pascal, kilopascal, bar, atmosphere, psi and torrconvertersSpeed ConverterConvert km/h, mph, m/s, knots and feet per secondconvertersTemperature ConverterConvert between Celsius, Fahrenheit and Kelvin with all scales shownconvertersTime ConverterConvert milliseconds, seconds, minutes, hours, days, weeks, months and yearsconvertersVolume ConverterConvert liters, milliliters, gallons, cups, pints and cubic metersconvertersWeight ConverterConvert milligrams, grams, kilograms, tonnes, ounces, pounds and stones
Date & Time5
dateAdd or Subtract DaysAdd or subtract days, weeks, months and years from any datedateAge CalculatorCalculate exact age in years, months and days from any birth datedateBusiness Days CalculatorCount working days between two dates, excluding weekends and holidaysdateCountdown to a DateDays, weeks, months and years until — or since — any datedateDays Between DatesCount the exact days, weeks, months and years between two dates
Text5
textCase ConverterConvert text to upper, lower, title, sentence or alternating casetextCharacter CounterCount characters with and without spaces, plus words and linestextReading Time CalculatorEstimate how long it takes to read or speak any texttextText CleanerRemove extra spaces, blank lines and duplicate lines from any texttextWord CounterCount words, characters, sentences and paragraphs in any text
Developer7
developerBase64 DecoderDecode Base64 strings back to readable textdeveloperBase64 EncoderEncode any text, including Unicode, to Base64developerHash GeneratorGenerate MD5, SHA-1 and SHA-256 hashes of any textdeveloperJSON FormatterFormat, minify and validate JSON with one clickdeveloperRegex TesterTest regular expressions against text with live matchesdeveloperURL DecoderDecode percent-encoded URLs back to readable textdeveloperURL EncoderEncode text for safe use inside URLs and query strings
SEO4
Generators8
generatorsLorem Ipsum GeneratorGenerate placeholder paragraphs, sentences or words for mockupsgeneratorsPassword GeneratorCreate strong, random passwords with adjustable length and character setsgeneratorsQR Code GeneratorCreate a downloadable QR code for any URL or text, with colors and sizegeneratorsRandom Name GeneratorGenerate random realistic names for characters, brands and testsgeneratorsRandom Number GeneratorRoll any number of random integers within a range, with or without repeatsgeneratorsTeam SplitterSplit a list of names into balanced random teamsgeneratorsUUID GeneratorGenerate RFC 4122 version 4 UUIDs, one or many at a timegeneratorsWheel SpinnerSpin a customizable wheel to make a fair random decision
Health & Fitness5
healthBMI CalculatorCalculate your Body Mass Index and healthy weight rangehealthBMR CalculatorCalculate your Basal Metabolic Rate with the Mifflin-St Jeor equationhealthBody Fat CalculatorEstimate body fat percentage with the UhealthDaily Calorie CalculatorCalculate the calories you need to maintain, lose or gain weighthealthIdeal Weight CalculatorFind your ideal weight range using four medical formulas
Business4
businessBreakeven CalculatorFind how many units you must sell to cover your costsbusinessCPM CalculatorCalculate CPM, CPC and cost per impression for adsbusinessProfit Margin CalculatorCalculate profit margin and markup from cost and revenuebusinessROI CalculatorCalculate return on investment as a percentage and in money