All tools
341 tools in this section, each with a documented method and sources.
Unit converters
/units/length/cm-to-inchesCentimeters to inchesTier 0/units/mass/kg-to-lbsKilograms to poundsTier 0/units/length/mm-to-inchesMillimeters to inchesTier 0/units/temperature/celsius-to-fahrenheitCelsius to FahrenheitTier 0/units/mass/lbs-to-kgPounds to kilogramsTier 0/units/length/inches-to-cmInches to centimetersTier 0/units/length/km-to-milesKm to milesTier 0/units/temperature/fahrenheit-to-celsiusFahrenheit to CelsiusTier 0/units/length/meters-to-feetMeters to feetTier 0/units/length/miles-to-kmMiles to kmTier 0/units/volume/liters-to-gallonsLiters to gallonsTier 0/units/volume/oz-to-cupsFluid ounces to cupsTier 0/units/length/feet-to-metersFeet to metersTier 0/units/length/inches-to-mmInches to millimetersTier 0/units/mass/grams-to-ouncesGrams to ouncesTier 0/units/mass/lbs-to-ouncesPounds to ouncesTier 0/units/volume/ml-to-ozMilliliters to fluid ouncesTier 0/units/volume/tablespoons-to-cupsTablespoons to cupsTier 0/units/length/cm-to-feetCentimeters to feetTier 0/units/length/inches-to-feetInches to feetTier 0/units/mass/grams-to-lbsGrams to poundsTier 0/units/mass/ounces-to-lbsOunces to poundsTier 0/units/area/square-feet-to-acresSquare feet to acresTier 0/units/length/cm-to-mmCentimeters to millimetersTier 0/units/length/mm-to-cmMillimeters to centimetersTier 0/units/volume/oz-to-mlFluid ounces to millilitersTier 0/units/length/cm-to-metersCentimeters to metersTier 0/units/length/feet-to-inchesFeet to inchesTier 0/units/length/feet-to-milesFeet to milesTier 0/units/length/meters-to-cmMeters to centimetersTier 0/units/length/feet-to-cmFeet to centimetersTier 0/units/volume/gallons-to-quartsGallons to quartsTier 0/units/volume/liters-to-mlLiters to millilitersTier 0/units/volume/teaspoons-to-tablespoonsTeaspoons to tablespoonsTier 0/units/volume/cups-to-ozCups to fluid ouncesTier 0/units/volume/oz-to-tablespoonsFluid ounces to tablespoonsTier 0/units/volume/quarts-to-cupsQuarts to cupsTier 0/units/speed/knots-to-mphKnots to miles per hourTier 0/units/mass/grams-to-kgGrams to kilogramsTier 0/units/mass/mg-to-gramsMilligrams to gramsTier 0/units/mass/ounces-to-gramsOunces to gramsTier 0/units/temperature/kelvin-to-celsiusKelvin to CelsiusTier 0/units/volume/ml-to-cupsMilliliters to cupsTier 0/units/speed/kmh-to-mphKilometers per hour to miles per hourTier 0/units/length/meters-to-yardsMeters to yardsTier 0/units/mass/lbs-to-tonsPounds to tonsTier 0/units/mass/tons-to-lbsTons to poundsTier 0/units/volume/cups-to-quartsCups to quartsTier 0/units/volume/gallons-to-litersGallons to litersTier 0/units/volume/liters-to-quartsLiters to quartsTier 0/units/area/square-feet-to-square-metersSquare feet to square metersTier 0/units/area/square-meters-to-square-feetSquare meters to square feetTier 0/units/time/minutes-to-hoursMinutes to hoursTier 0/units/data/gb-to-mbGigabytes to megabytesTier 0/units/data/kb-to-mbKilobytes to megabytesTier 0/units/data/mb-to-gbMegabytes to gigabytesTier 0/units/length/miles-to-feetMiles to feetTier 0/units/length/yards-to-metersYards to metersTier 0/units/temperature/celsius-to-kelvinCelsius to KelvinTier 0/units/area/hectares-to-acresHectares to acresTier 0/units/time/seconds-to-minutesSeconds to minutesTier 0/units/data/mb-to-kbMegabytes to kilobytesTier 0/units/torque/newton-meters-to-foot-poundsNewton-meters to pound-feetTier 0/units/length/nautical-miles-to-milesNautical miles to milesTier 0/units/mass/stone-to-lbsStone to poundsTier 0/units/mass/lbs-to-gramsPounds to gramsTier 0/units/volume/cubic-feet-to-gallonsCubic feet to gallonsTier 0/units/volume/cups-to-tablespoonsCups to tablespoonsTier 0/units/volume/tablespoons-to-mlTablespoons to millilitersTier 0/units/area/acres-to-square-feetAcres to square feetTier 0/units/time/milliseconds-to-secondsMilliseconds to secondsTier 0/units/pressure/bar-to-psiBar to pounds per square inchTier 0/units/angle/radians-to-degreesRadians to degreesTier 0/units/volume/ml-to-litersMilliliters to litersTier 0/units/speed/m-s-to-mphMeters per second to miles per hourTier 0/units/speed/mph-to-m-sMiles per hour to meters per secondTier 0/units/pressure/kpa-to-psiKilopascals to pounds per square inchTier 0/units/angle/degrees-to-radiansDegrees to radiansTier 0/units/mass/kg-to-gramsKilograms to gramsTier 0/units/temperature/fahrenheit-to-kelvinFahrenheit to KelvinTier 0/units/volume/cups-to-mlCups to millilitersTier 0/units/time/hours-to-daysHours to daysTier 0/units/force/newtons-to-poundsNewtons to pounds-forceTier 0/units/force/pounds-to-newtonsPounds-force to newtonsTier 0/units/volume/quarts-to-litersQuarts to litersTier 0/units/speed/mph-to-kmhMiles per hour to kilometers per hourTier 0/units/data/gb-to-tbGigabytes to terabytesTier 0/units/data/tb-to-gbTerabytes to gigabytesTier 0/units/power/kw-to-hpKilowatts to horsepowerTier 0/units/mass/metric-tons-to-tonsMetric tons to tonsTier 0/units/temperature/kelvin-to-fahrenheitKelvin to FahrenheitTier 0/units/pressure/psi-to-barPounds per square inch to barTier 0/units/time/hours-to-minutesHours to minutesTier 0/units/mass/grams-to-mgGrams to milligramsTier 0/units/area/acres-to-hectaresAcres to hectaresTier 0/units/pressure/pa-to-psiPascals to pounds per square inchTier 0/units/power/hp-to-kwHorsepower to kilowattsTier 0/units/power/watts-to-hpWatts to horsepowerTier 0/units/volume/cc-to-cubic-inchesCubic centimeters to cubic inchesTier 0/units/volume/cubic-inches-to-ccCubic inches to cubic centimetersTier 0/units/volume/pints-to-cupsPints to cupsTier 0/units/pressure/psi-to-kpaPounds per square inch to kilopascalsTier 0/units/length/light-years-to-milesLight-years to milesTier 0/units/length/micrometers-to-mmMicrometers to millimetersTier 0/units/volume/gallons-to-cubic-feetGallons to cubic feetTier 0/units/speed/mph-to-knotsMiles per hour to knotsTier 0/units/time/seconds-to-millisecondsSeconds to millisecondsTier 0/units/datarate/mbps-to-mb-sMegabits per second to megabytes per secondTier 0/units/pressure/kpa-to-atmKilopascals to atmospheresTier 0/units/energy/joules-to-caloriesJoules to caloriesTier 0/units/energy/joules-to-evJoules to electronvoltsTier 0/units/speed/mph-to-feet-per-secondMiles per hour to feet per secondTier 0/units/time/days-to-hoursDays to hoursTier 0/units/data/bits-to-bytesBits to bytesTier 0/units/energy/kcal-to-kjKilocalories to kilojoulesTier 0/units/energy/kj-to-kcalKilojoules to kilocaloriesTier 0/units/torque/foot-pounds-to-newton-metersPound-feet to newton-metersTier 0/units/time/months-to-yearsMonths to yearsTier 0/units/pressure/psi-to-atmPounds per square inch to atmospheresTier 0/units/energy/ev-to-joulesElectronvolts to joulesTier 0/units/mass/lbs-to-stonePounds to stoneTier 0/units/area/square-yards-to-square-feetSquare yards to square feetTier 0/units/data/bytes-to-kbBytes to kilobytesTier 0/units/pressure/bar-to-kpaBar to kilopascalsTier 0/units/pressure/kpa-to-barKilopascals to barTier 0/units/pressure/mbar-to-psiMillibar to pounds per square inchTier 0/units/fuel/km-l-to-mpgkm/L to MPGTier 0/units/fuel/mpg-to-km-lMPG to km/LTier 0/units/volume/pints-to-litersPints to litersTier 0/units/volume/tablespoons-to-teaspoonsTablespoons to teaspoonsTier 0/units/area/square-km-to-square-milesSquare kilometers to square milesTier 0/units/area/square-miles-to-square-kmSquare miles to square kilometersTier 0/units/pressure/atm-to-psiAtmospheres to pounds per square inchTier 0/units/energy/btu-to-kwhBTU to kilowatt-hoursTier 0/units/energy/calories-to-joulesCalories to joulesTier 0/units/energy/kwh-to-btuKilowatt-hours to BTUTier 0/units/power/watts-to-btu-per-hourWatts to BTU/hTier 0/units/fuel/l-100km-to-mpgL/100 km to MPGTier 0/units/time/days-to-weeksDays to weeksTier 0/units/energy/kwh-to-joulesKilowatt-hours to joulesTier 0/units/power/btu-per-hour-to-wattsBTU/h to wattsTier 0/units/mass/kg-to-stoneKilograms to stoneTier 0/units/mass/stone-to-kgStone to kilogramsTier 0/units/pressure/mmhg-to-kpaMillimeters of mercury to kilopascalsTier 0/units/power/hp-to-wattsHorsepower to wattsTier 0/units/volume/teaspoons-to-mlTeaspoons to millilitersTier 0/units/speed/knots-to-kmhKnots to kilometers per hourTier 0/units/time/weeks-to-daysWeeks to daysTier 0/units/time/years-to-daysYears to daysTier 0/units/power/btu-per-hour-to-refrigeration-tonsBTU/h to tons of refrigerationTier 0/units/volume/cubic-meters-to-litersCubic meters to litersTier 0/units/speed/feet-per-second-to-mphFeet per second to miles per hourTier 0/units/data/gib-to-gbGibibytes to gigabytesTier 0/units/power/gigawatts-to-megawattsGigawatts to megawattsTier 0/units/fuel/mpg-to-l-100kmMPG to L/100 kmTier 0/units/frequency/rpm-to-hzRevolutions per minute to hertzTier 0/units/frequency/hz-to-rpmHertz to revolutions per minuteTier 0/units/density/kg-m3-to-g-cm3kg/m³ to g/cm³Tier 0/units/volume/ml-to-tablespoonsMilliliters to tablespoonsTier 0/units/volume/ml-to-teaspoonsMilliliters to teaspoonsTier 0/units/area/square-inches-to-square-cmSquare inches to square centimetersTier 0/units/power/refrigeration-tons-to-btu-per-hourTons of refrigeration to BTU/hTier 0/units/frequency/hz-to-khzHertz to kilohertzTier 0/units/capacitance/nf-to-ufNanofarads to microfaradsTier 0/units/capacitance/pf-to-ufPicofarads to microfaradsTier 0/units/capacitance/uf-to-nfMicrofarads to nanofaradsTier 0/units/speed/kmh-to-m-sKilometers per hour to meters per secondTier 0/units/capacitance/pf-to-nfPicofarads to nanofaradsTier 0/units/speed/m-s-to-kmhMeters per second to kilometers per hourTier 0/units/force/kgf-to-newtonsKilograms-force to newtonsTier 0/units/capacitance/nf-to-pfNanofarads to picofaradsTier 0/units/capacitance/uf-to-pfMicrofarads to picofaradsTier 0/units/pressure/inhg-to-hpaInches of mercury to hectopascalsTier 0
Code lookups
/codes/morse-code-translatorMorse code translatorTier 0/codes/roman-numeral-converterRoman numeral converterTier 0/codes/resistor-color-codeResistor color codeTier 0/codes/nato-phonetic-alphabetNATO phonetic alphabetTier 0/codes/braille-translatorBraille translatorTier 0/codes/credit-card-validatorCredit card validatorTier 0/codes/ean-13-check-digitEAN-13 check digitTier 0/codes/upc-check-digitUPC check digitTier 0/codes/iban-validatorIBAN validatorTier 0/codes/smd-resistor-codeSMD resistor codeTier 0/codes/capacitor-codeCapacitor codeTier 0/codes/isbn-validatorISBN validatorTier 0
Developer tools
/dev/password-generatorPassword generatorTier 0/dev/json-formatterJSON formatterTier 0/dev/base64-encodeBase64 encode / decodeTier 0/dev/base64-decodeBase64 decodeTier 0/dev/binary-to-textBinary to textTier 0/dev/subnet-calculatorSubnet calculatorTier 0/dev/unix-timestamp-converterUnix timestamp converterTier 0/dev/jwt-decodeJWT decoderTier 0/dev/sha256-hashSHA-256 hashTier 0/dev/case-converterCase converterTier 0/dev/diff-checkerDiff checkerTier 0/dev/hex-to-decimalHex to decimalTier 0/dev/json-validatorJSON validatorTier 0/dev/decimal-to-hexDecimal to hexTier 0/dev/regex-testerRegex testerTier 0/dev/url-decodeURL decodeTier 0/dev/uuid-generatorUUID generatorTier 0/dev/xml-formatterXML formatterTier 0/dev/binary-to-decimalBinary to decimalTier 0/dev/rgb-to-hexRGB to HEXTier 0/dev/url-encodeURL encodeTier 0/dev/decimal-to-binaryDecimal to binaryTier 0/dev/guid-generatorGUID generatorTier 0/dev/hex-to-binaryHex to binaryTier 0/dev/binary-to-hexBinary to hexTier 0/dev/hex-to-rgbHEX to RGBTier 0/dev/cron-expression-parserCron expression parserTier 0/dev/text-to-binaryText to binaryTier 0/dev/json-to-csvJSON to CSVTier 0/dev/md5-hashMD5 hashTier 0/dev/hex-to-textHex to textTier 0/dev/text-to-hexText to hexTier 0/dev/csv-to-jsonCSV to JSONTier 0/dev/json-minifyJSON minifyTier 0/dev/xml-to-jsonXML to JSONTier 0/dev/chmod-calculatorChmod calculatorTier 0/dev/markdown-to-htmlMarkdown to HTMLTier 0/dev/html-decodeHTML decodeTier 0/dev/json-escapeJSON escapeTier 0/dev/sha1-hashSHA-1 hashTier 0/dev/yaml-to-jsonYAML to JSONTier 0/dev/html-encodeHTML encodeTier 0/dev/json-to-yamlJSON to YAMLTier 0/dev/octal-to-decimalOctal to decimalTier 0/dev/unicode-converterUnicode converterTier 0/dev/json-to-xmlJSON to XMLTier 0/dev/hsl-to-hexHSL to HEXTier 0/dev/jwt-encoderJWT encoderTier 0/dev/ip-to-binaryIP to binaryTier 0/dev/slug-generatorSlug generatorTier 0/dev/crc32-checksumCRC-32 checksumTier 0/dev/sha512-hashSHA-512 hashTier 0/dev/ulid-generatorULID generatorTier 0/dev/hmac-generatorHMAC generatorTier 0
Size charts
Calculators
/calculators/health/bmi-calculatorBMI calculatorTier 0/calculators/finance/currency-converterCurrency converterTier 1/calculators/finance/mortgage-calculatorMortgage calculatorTier 0/calculators/health/due-date-calculatorDue date calculatorTier 0/calculators/math/random-number-generatorRandom number generatorTier 0/calculators/date/age-calculatorAge calculatorTier 0/calculators/date/date-difference-calculatorDate difference calculatorTier 0/calculators/health/calorie-calculatorCalorie calculatorTier 0/calculators/finance/compound-interestCompound interestTier 0/calculators/finance/car-loan-calculatorCar loan calculatorTier 0/calculators/finance/loan-calculatorLoan calculatorTier 0/calculators/finance/us/paycheck-calculatorPaycheck calculatorTier 0/calculators/math/percentagePercentageTier 0/calculators/everyday/discount-calculatorDiscount calculatorTier 0/calculators/everyday/gpa-calculatorGPA calculatorTier 0/calculators/health/body-fat-calculatorBody fat calculatorTier 0/calculators/health/ovulation-calculatorOvulation calculatorTier 0/calculators/date/hours-calculatorHours calculatorTier 0/calculators/everyday/grade-calculatorGrade calculatorTier 0/calculators/everyday/tip-calculatorTip calculatorTier 0/calculators/cooking/grams-to-cupsGrams to cups converterTier 0/calculators/date/add-to-date-calculatorAdd to date calculatorTier 0/calculators/finance/amortization-scheduleAmortization scheduleTier 0/calculators/finance/inflation-calculatorInflation calculatorTier 0/calculators/finance/salary-calculatorSalary to hourly calculatorTier 0/calculators/health/bmr-calculatorBMR calculatorTier 0/calculators/finance/br/net-salaryBrazil net salary (CLT)Tier 0/calculators/finance/us/401k-calculator401(k) calculatorTier 0/calculators/health/ideal-weight-calculatorIdeal weight calculatorTier 0/calculators/date/time-card-calculatorTime card calculatorTier 0/calculators/date/week-number-calculatorWeek number calculatorTier 0/calculators/everyday/fuel-cost-calculatorFuel cost calculatorTier 0/calculators/finance/margin-calculatorMargin calculatorTier 0/calculators/finance/us/roth-ira-calculatorRoth IRA calculatorTier 0/calculators/math/average-calculatorAverage calculatorTier 0/calculators/math/fraction-calculatorFraction calculatorTier 0/calculators/finance/br/vacation-payBrazil vacation payTier 0/calculators/finance/simple-interest-calculatorSimple interestTier 0/calculators/finance/us/sales-tax-calculatorSales tax calculatorTier 0/calculators/health/pace-calculatorPace calculatorTier 0/calculators/health/water-intake-calculatorWater intake calculatorTier 0/calculators/math/square-root-calculatorSquare rootTier 0/calculators/date/business-days-calculatorBusiness days calculatorTier 0/calculators/finance/roi-calculatorROI calculatorTier 0/calculators/math/area/circleCircle areaTier 0/calculators/electronics/ohms-law-calculatorOhm's law calculatorTier 0/calculators/finance/vat-calculatorVAT calculatorTier 0/calculators/math/quadratic-equation-solverQuadratic equation solverTier 0/calculators/math/ratio-calculatorRatio calculatorTier 0/calculators/math/standard-deviation-calculatorStandard deviationTier 0/calculators/date/day-of-week-calculatorDay of the week calculatorTier 0/calculators/everyday/electricity-cost-calculatorElectricity cost calculatorTier 0/calculators/finance/cagr-calculatorCAGR calculatorTier 0/calculators/math/pythagorean-theorem-calculatorPythagorean theoremTier 0/calculators/finance/br/overtime-payBrazil overtime payTier 0/calculators/finance/break-even-calculatorBreak-even calculatorTier 0/calculators/finance/present-value-calculatorPresent value calculatorTier 0/calculators/math/area/triangleTriangle areaTier 0/calculators/math/decimal-to-fractionDecimal to fractionTier 0/calculators/math/exponent-calculatorExponent calculatorTier 0/calculators/math/scientific-notation-calculatorScientific notationTier 0/calculators/math/slope-calculatorSlope calculatorTier 0/calculators/math/volume/cylinderCylinder volumeTier 0/calculators/finance/br/thirteenth-salaryBrazil 13th salaryTier 0/calculators/finance/future-value-calculatorFuture value calculatorTier 0/calculators/math/area/rectangleRectangle areaTier 0/calculators/math/gcf-lcm-calculatorGCF and LCMTier 0/calculators/math/rounding-calculatorRounding calculatorTier 0/calculators/math/volume/boxBox volumeTier 0/calculators/electronics/voltage-divider-calculatorVoltage divider calculatorTier 0/calculators/finance/npv-calculatorNPV calculatorTier 0/calculators/finance/savings-goal-calculatorSavings goal calculatorTier 0/calculators/math/logarithm-calculatorLogarithm calculatorTier 0/calculators/math/percent-error-calculatorPercent errorTier 0/calculators/math/permutations-combinationsPermutations and combinationsTier 0/calculators/math/volume/sphereSphere volumeTier 0/calculators/electronics/led-resistor-calculatorLED resistor calculatorTier 0/calculators/finance/br/fgts-calculatorBrazil FGTS calculatorTier 0/calculators/finance/br/inss-calculatorBrazil INSS calculatorTier 0/calculators/finance/br/unemployment-insuranceBrazil unemployment insuranceTier 0/calculators/finance/credit-card-payoff-calculatorCredit card payoffTier 0/calculators/finance/irr-calculatorIRR calculatorTier 0/calculators/everyday/unit-price-calculatorUnit price calculatorTier 0/calculators/finance/apr-apy-calculatorAPR to APY calculatorTier 0/calculators/finance/br/irrf-calculatorBrazil IRRF calculatorTier 0/calculators/finance/us/overtime-calculatorOvertime calculatorTier 0/calculators/math/area/trapezoidTrapezoid areaTier 0/calculators/math/prime-factorizationPrime factorizationTier 0/calculators/math/volume/coneCone volumeTier 0/calculators/finance/rule-of-72-calculatorRule of 72 calculatorTier 0/calculators/finance/us/capital-gains-tax-calculatorCapital gains tax calculatorTier 0/calculators/finance/us/self-employment-tax-calculatorSelf-employment tax calculatorTier 0/calculators/math/factorial-calculatorFactorialTier 0/calculators/finance/br/night-shift-premiumBrazil night shift premiumTier 0
Tools
/tools/text/word-counterWord counterTier 0/tools/image/qr-code-generatorQR code generatorTier 0/tools/text/character-counterCharacter counterTier 0/tools/text/lorem-ipsum-generatorLorem ipsum generatorTier 0/tools/text/reverse-textReverse textTier 0/tools/text/remove-duplicate-linesRemove duplicate linesTier 0/tools/text/sort-linesSort linesTier 0