Unit Conversion Calculators

Length, weight, temperature, currency and other unit converters.

Popular:Force Converter Length Converter Voltage Converter Molarity Converter Cooking Unit Converter Weight Converter

Physical Science

9 calculators

Length

7 calculators

Electrical

5 calculators

Chemistry

5 calculators

Cooking & Kitchen

4 calculators

Acceleration ConverterConvert acceleration between meters per second squared, feet per second squared, and standard gravity (g).Angle Unit ConverterConvert an angle between degrees, radians, gradians, revolutions, arcminutes, and arcseconds.Area ConverterConvert an area between metric and imperial/land units — square meters, hectares, square kilometers, acres, square feet, square yards, square miles, and more.Bandwidth ConverterConvert network bandwidth between bits per second, kbps, Mbps, Gbps, and their bytes-per- second equivalents.Capacitance ConverterConvert capacitance between farads, millifarads, microfarads, nanofarads, and picofarads.Celsius Fahrenheit ConverterConvert a temperature between Celsius and Fahrenheit, in either direction.Concentration ConverterConvert mass concentration between g/L, mg/L, mg/mL, µg/mL, kg/m³, and %(w/v).Conversion CalculatorConvert length measurements between metric and imperial units — millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles.Cooking Unit ConverterConvert common recipe measurements — cups, tablespoons, teaspoons, milliliters, and fluid ounces — for scaling recipes up or down.Data Storage ConverterConvert a data size between bits, bytes, kilobytes, megabytes, gigabytes, and terabytes.Data Transfer Rate ConverterConvert a data transfer rate between bits per second, kbps, Mbps, Gbps, and their bytes-per- second equivalents.Density ConverterConvert density between kg/m³, g/cm³, lb/ft³, and lb/in³.Distance ConverterConvert a distance between metric and imperial units — millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles.Electric Current ConverterConvert electric current between microamperes, milliamperes, amperes, and kiloamperes.Energy ConverterConvert energy between joules, kilojoules, calories, kilocalories, watt-hours, kWh, and BTU.Force ConverterConvert force between newtons, kilonewtons, dynes, pound-force, and kilogram-force.Frequency ConverterConvert frequency between hertz, kilohertz, megahertz, gigahertz, and RPM.Fuel Consumption ConverterConvert a fuel consumption figure between liters per 100km, km/l, and miles per gallon (US and UK).Fuel Economy ConverterConvert a fuel economy figure between km/l, miles per gallon (US and UK), and liters per 100km.Height ConverterConvert a height in centimeters to the everyday "feet and inches" format.Illumination ConverterConvert illuminance between lux and foot-candles.Inductance ConverterConvert inductance between henries, millihenries, and microhenries.Kilograms Pounds ConverterConvert a weight from kilograms to pounds.Kilometers Miles ConverterConvert a distance from kilometers to miles.Kitchen Measurement ConverterConvert larger kitchen and batch-cooking measurements — quarts, pints, gallons, cups, and liters — for bulk recipes or food-service quantities.Length ConverterConvert a length measurement between metric and imperial units — millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles.Luminance ConverterConvert luminance between candela per square meter (nit), and foot-lamberts.Mass ConverterConvert a mass between metric and imperial units — milligrams, grams, kilograms, tonnes, pounds, and ounces.Meters Feet ConverterConvert a length from meters to feet.Metric to Imperial ConverterConvert metric length measurements — millimeters, centimeters, meters, and kilometers — into imperial inches, feet, yards, and miles.Miles Kilometers ConverterConvert a distance from miles to kilometers.Molarity ConverterConvert molar concentration between mol/L, mmol/L, µmol/L, and mol/m³.Molecular Weight CalculatorCalculate the molecular weight of a chemical compound from its formula, including nested parentheses like Ca(OH)2.Number Base ConverterConvert a number between any two numeral bases, from binary (base 2) up to base 36.Pace ConverterConvert a running or cycling pace between minutes per km and minutes per mile, along with the equivalent speed.Parts Per Billion CalculatorConvert between parts per billion (ppb) and other ratio units — percent, ppm, and ppt.Parts Per Million CalculatorConvert between parts per million (ppm) and other ratio units — percent, ppb, and ppt.Pounds Kilograms ConverterConvert a weight from pounds to kilograms.Power ConverterConvert power between watts, kilowatts, megawatts, horsepower (hp), and metric horsepower (PS).Pressure ConverterConvert pressure between pascals, kilopascals, bar, atmospheres, PSI, and mmHg.Resistance ConverterConvert electrical resistance between milliohms, ohms, kilohms, and megohms.Speed ConverterConvert a speed between units — meters per second, kilometers per hour, miles per hour, knots, and feet per second.Temperature ConverterConvert a temperature between Celsius, Fahrenheit, and Kelvin.Time Unit ConverterConvert a duration between time units — milliseconds, seconds, minutes, hours, days, weeks, months, and years.Torque ConverterConvert torque between newton-meters, kilogram-force-meters, pound-feet, and pound-inches.US to Metric ConverterConvert US customary volume measurements — gallons, quarts, cups, fluid ounces, and tablespoons — into metric milliliters and liters.Voltage ConverterConvert voltage between microvolts, millivolts, volts, and kilovolts.Volume ConverterConvert a volume between metric and US customary units — milliliters, liters, cubic meters, gallons, quarts, cups, and more.Weight ConverterConvert a weight between metric and imperial units — milligrams, grams, kilograms, tonnes, pounds, and ounces.

Unit Conversion2 min read

Celsius, Fahrenheit, and Kelvin Conversion Explained (Why It's Not Just Multiplication)

Unlike most unit conversions (which are a single multiplication), converting between temperature scales needs both a multiplication AND an addition or subtraction, because Celsius, Fahrenheit, and Kelvin don't share the same zero point — this is why there's exactly one temperature, −40°, where Celsius and Fahrenheit happen to read the same number.

Unit Conversion1 min read

How a Running Pace Is Converted Between Km and Miles

Converting a pace from minutes-per-km to minutes-per-mile goes through speed as an intermediate step — pace becomes a speed, that speed converts between distance units, then converts back into a pace in the new unit.

Unit Conversion1 min read

How Data Storage Sizes Are Converted

Converting between bytes, kilobytes, megabytes, gigabytes, and terabytes uses the binary (1024-based) convention that Windows, macOS, and file managers report sizes in — not the 1000-based convention some manufacturers and standards bodies use instead.

Unit Conversion1 min read

How Data Transfer Rates Are Converted

Network speeds like Mbps and Gbps convert using a 1,000-based decimal convention — a different base than data storage sizes use — and converting between bit-based and byte-based rates always involves an extra factor of 8.

Unit Conversion1 min read

How Density Connects Mass and Volume

Converting a density value between unit systems combines a mass conversion (like kilograms to pounds) and a volume conversion (like cubic meters to cubic feet) into a single factor, since density is mass divided by volume.

Unit Conversion1 min read

How Electric Current Units Are Converted

Electric current units — microamperes, milliamperes, amperes, and kiloamperes — are all powers of ten apart, so converting between them is a single multiplication or division by the right factor of 1,000.

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