Converters
Unit Converters Calculators
Length, weight, temperature, speed, data size and more. Free calculators with formulas and worked examples.
General converter
Converters
Length ConverterEnter a length, choose its unit and read every other unit at once.Weight and Mass ConverterSwitch between metric and imperial mass units in one step.Temperature ConverterEnter a temperature in any scale and see the other three.Speed ConverterCompare speeds across road, sport, marine and scientific units.Area ConverterLand and floor-area conversions for property, farming and construction.Volume ConverterKitchen, fuel and tank volumes between metric and US/UK units.Data Storage ConverterWhy a 500 GB drive shows up smaller in your operating system, answered in numbers.Pressure ConverterTire pressure, weather and engineering pressure units side by side.Energy ConverterElectricity bills, food labels and heating energy in one tool.Power ConverterEngine, motor and air-conditioner ratings across units.Time ConverterQuick duration conversions for project planning, uptime and timers.Angle ConverterSwitch between degrees and radians for maths, CAD and navigation.Force ConverterEngineering force units, with the standard gravity relation built in.Fuel Economy Converter (MPG, L/100 km)Compare car fuel efficiency between American, British and metric conventions.
Length
Centimeters to Inches ConverterType a value in centimeters to get it in inches, and see the reverse conversion.Inches to Centimeters ConverterType a value in inches to get it in centimeters, and see the reverse conversion.Millimeters to Inches ConverterType a value in millimeters to get it in inches, and see the reverse conversion.Inches to Millimeters ConverterType a value in inches to get it in millimeters, and see the reverse conversion.Feet to Meters ConverterType a value in feet to get it in meters, and see the reverse conversion.Meters to Feet ConverterType a value in meters to get it in feet, and see the reverse conversion.Feet to Centimeters ConverterType a value in feet to get it in centimeters, and see the reverse conversion.Kilometers to Miles ConverterType a value in kilometers to get it in miles, and see the reverse conversion.Miles to Kilometers ConverterType a value in miles to get it in kilometers, and see the reverse conversion.Yards to Meters ConverterType a value in yards to get it in meters, and see the reverse conversion.Meters to Yards ConverterType a value in meters to get it in yards, and see the reverse conversion.CM to Feet and Inches Converter (Height)Convert your height between centimetres and feet and inches.Nautical miles to Kilometers ConverterType a value in nautical miles to get it in kilometers, and see the reverse conversion.Miles to Feet ConverterType a value in miles to get it in feet, and see the reverse conversion.
Weight
Kilograms to Pounds ConverterType a value in kilograms to get it in pounds, and see the reverse conversion.Pounds to Kilograms ConverterType a value in pounds to get it in kilograms, and see the reverse conversion.Grams to Ounces ConverterType a value in grams to get it in ounces, and see the reverse conversion.Ounces to Grams ConverterType a value in ounces to get it in grams, and see the reverse conversion.Kilograms to Stone ConverterType a value in kilograms to get it in stone, and see the reverse conversion.Stone to Kilograms ConverterType a value in stone to get it in kilograms, and see the reverse conversion.US short tons to Kilograms ConverterType a value in us short tons to get it in kilograms, and see the reverse conversion.Ounces to Pounds ConverterType a value in ounces to get it in pounds, and see the reverse conversion.
Temperature
Celsius to Fahrenheit ConverterType a value in celsius to get it in fahrenheit, and see the reverse conversion.Fahrenheit to Celsius ConverterType a value in fahrenheit to get it in celsius, and see the reverse conversion.Celsius to Kelvin ConverterType a value in celsius to get it in kelvin, and see the reverse conversion.
Volume
Liters to US gallons ConverterType a value in liters to get it in us gallons, and see the reverse conversion.US gallons to Liters ConverterType a value in us gallons to get it in liters, and see the reverse conversion.Milliliters to US fluid ounces ConverterType a value in milliliters to get it in us fluid ounces, and see the reverse conversion.US fluid ounces to Milliliters ConverterType a value in us fluid ounces to get it in milliliters, and see the reverse conversion.US cups to Milliliters ConverterType a value in us cups to get it in milliliters, and see the reverse conversion.Milliliters to US cups ConverterType a value in milliliters to get it in us cups, and see the reverse conversion.Tablespoons to Milliliters ConverterType a value in tablespoons to get it in milliliters, and see the reverse conversion.Teaspoons to Milliliters ConverterType a value in teaspoons to get it in milliliters, and see the reverse conversion.Cubic feet to Cubic meters ConverterType a value in cubic feet to get it in cubic meters, and see the reverse conversion.
Speed
Miles per hour to Kilometers per hour ConverterType a value in miles per hour to get it in kilometers per hour, and see the reverse conversion.Kilometers per hour to Miles per hour ConverterType a value in kilometers per hour to get it in miles per hour, and see the reverse conversion.Knots to Miles per hour ConverterType a value in knots to get it in miles per hour, and see the reverse conversion.
Area
Square feet to Square meters ConverterType a value in square feet to get it in square meters, and see the reverse conversion.Square meters to Square feet ConverterType a value in square meters to get it in square feet, and see the reverse conversion.Acres to Hectares ConverterType a value in acres to get it in hectares, and see the reverse conversion.Hectares to Acres ConverterType a value in hectares to get it in acres, and see the reverse conversion.Marla, Kanal and Square Feet Converter (Pakistan Land Units)Convert plot sizes between marla, kanal, square feet, square yards and acres.Acres to Square feet ConverterType a value in acres to get it in square feet, and see the reverse conversion.
Power
Kilowatts to Horsepower ConverterType a value in kilowatts to get it in horsepower, and see the reverse conversion.Horsepower to Kilowatts ConverterType a value in horsepower to get it in kilowatts, and see the reverse conversion.Watts to BTU per hour ConverterType a value in watts to get it in btu per hour, and see the reverse conversion.
Pressure
PSI to Bar ConverterType a value in psi to get it in bar, and see the reverse conversion.Bar to PSI ConverterType a value in bar to get it in psi, and see the reverse conversion.Kilopascals to PSI ConverterType a value in kilopascals to get it in psi, and see the reverse conversion.Atmospheres to PSI ConverterType a value in atmospheres to get it in psi, and see the reverse conversion.
Energy
Kilojoules to Kilocalories ConverterType a value in kilojoules to get it in kilocalories, and see the reverse conversion.Kilocalories to Kilojoules ConverterType a value in kilocalories to get it in kilojoules, and see the reverse conversion.BTU to Kilowatt-hours ConverterType a value in btu to get it in kilowatt-hours, and see the reverse conversion.
Data
Megabytes to Gigabytes ConverterType a value in megabytes to get it in gigabytes, and see the reverse conversion.Gigabytes to Terabytes ConverterType a value in gigabytes to get it in terabytes, and see the reverse conversion.Megabits per second to Megabytes per second ConverterType a value in megabits per second to get it in megabytes per second, and see the reverse conversion.
Torque
About these calculators
Convert between common units with the exact conversion factors shown. Each converter lists the factor it uses so you can check the result.
Each calculator explains its formula, includes a worked example and lists its sources. Read how we check them on our editorial policy page, or browse all calculators.
Please note: TheCalcTools gives general estimates for information and education. It is not financial, medical, legal or tax advice, and results should be checked before you make a decision. See our disclaimer and about page.