Unit Conversion Calculators
Convert length, weight, volume, temperature, area, speed, pressure, energy, power and data between US and metric units — every unit at once, with exact definitions and conversion charts for the everyday pairs.
85 calculators · A–Z of all calculators
- Length ConverterInches, feet, miles, centimeters, meters and kilometers.
- Weight ConverterPounds, ounces, stone, tons, grams and kilograms.
- Volume ConverterGallons, quarts, cups, fluid ounces, liters and cubic feet.
- Temperature ConverterFahrenheit, Celsius and Kelvin, with the formulas.
- Area ConverterSquare feet, square meters, acres and hectares.
- Speed Convertermph, km/h, knots, meters and feet per second.
- Pressure Converterpsi, kPa, bar, atmospheres and inches of mercury.
- Energy ConverterkWh, BTU, therms, joules and calories.
- Power ConverterWatts, kilowatts, horsepower and BTU per hour.
- Data Storage ConverterBytes, MB, GB and TB — decimal and binary.
- Angle ConverterDegrees, radians, gradians and turns.
- Time ConverterSeconds, minutes, hours, days, weeks and years.
- Torque ConverterPound-feet, newton-meters and pound-inches.
- Flow Rate ConverterGPM, liters per minute, CFM and m³/h.
- Inches to Centimeters ConverterInches to cm and back, with a chart.
- Centimeters to Inches Convertercm to inches and back, with a chart.
- Feet to Meters ConverterFeet to meters and back, with a chart.
- Meters to Feet ConverterMeters to feet and back, with a chart.
- Pounds to Kilograms ConverterPounds to kg and back, with a chart.
- Kilograms to Pounds Converterkg to lbs and back, with a chart.
- Fahrenheit to Celsius Converter°F to °C and back, with oven temperatures.
- Celsius to Fahrenheit Converter°C to °F and back, with a chart.
- Miles to Kilometers ConverterMiles to km and back, with race distances.
- Kilometers to Miles Converterkm to miles and back, with race distances.
- Ounces to Grams ConverterOunces to grams and back, with a chart.
- Grams to Ounces ConverterGrams to ounces and back, with a chart.
- Millimeters to Inches Convertermm to inches and back, with a chart.
- Inches to Millimeters ConverterInches and fractions to mm, with a chart.
- Feet to Inches ConverterFeet to inches and back, with a chart.
- Inches to Feet ConverterInches to feet and back, with a chart.
- Yards to Feet ConverterYards to feet and back, with a chart.
- Feet to Yards ConverterFeet to yards and back, with a chart.
- Meters to Yards ConverterMeters to yards and back, with a chart.
- Yards to Meters ConverterYards to meters and back, with a chart.
- Centimeters to Feet ConverterCentimeters to feet and back, with a chart.
- Feet to Centimeters ConverterFeet to centimeters and back, with a chart.
- Miles to Feet ConverterMiles to feet and back, with a chart.
- Feet to Miles ConverterFeet to miles and back, with a chart.
- Ounces to Pounds ConverterOunces to pounds and back, with a chart.
- Pounds to Ounces ConverterPounds to ounces and back, with a chart.
- Grams to Pounds ConverterGrams to pounds and back, with a chart.
- Pounds to Grams ConverterPounds to grams and back, with a chart.
- Stone to Pounds ConverterStone to pounds and back, with a chart.
- Pounds to Stone ConverterPounds to stone and back, with a chart.
- Stone to Kilograms ConverterStone to kilograms and back, with a chart.
- Kilograms to Stone ConverterKilograms to stone and back, with a chart.
- Cups to Milliliters ConverterCups to milliliters and back, with a chart.
- Milliliters to Cups ConverterMilliliters to cups and back, with a chart.
- Cups to Ounces ConverterCups to ounces and back, with a chart.
- Ounces to Cups ConverterOunces to cups and back, with a chart.
- Tablespoons to Milliliters ConverterTablespoons to milliliters and back, with a chart.
- Teaspoons to Milliliters ConverterTeaspoons to milliliters and back, with a chart.
- Cups to Tablespoons ConverterCups to tablespoons and back, with a chart.
- Quarts to Cups ConverterQuarts to cups and back, with a chart.
- Gallons to Quarts ConverterGallons to quarts and back, with a chart.
- Cubic Feet to Gallons ConverterCubic feet to gallons and back, with a chart.
- Gallons to Cubic Feet ConverterGallons to cubic feet and back, with a chart.
- Liters to Ounces ConverterLiters to ounces and back, with a chart.
- Celsius to Kelvin ConverterCelsius to kelvin and back, with a chart.
- Kelvin to Celsius ConverterKelvin to celsius and back, with a chart.
- Square Feet to Square Meters ConverterSquare feet to square meters and back, with a chart.
- Square Meters to Square Feet ConverterSquare meters to square feet and back, with a chart.
- Acres to Square Feet ConverterAcres to square feet and back, with a chart.
- Square Feet to Acres ConverterSquare feet to acres and back, with a chart.
- Acres to Hectares ConverterAcres to hectares and back, with a chart.
- Hectares to Acres ConverterHectares to acres and back, with a chart.
- MPH to km/h ConverterMPH to km/h and back, with a chart.
- km/h to MPH Converterkm/h to mph and back, with a chart.
- Knots to MPH ConverterKnots to mph and back, with a chart.
- MPH to Knots ConverterMPH to knots and back, with a chart.
- PSI to Bar ConverterPSI to bar and back, with a chart.
- Bar to PSI ConverterBar to psi and back, with a chart.
- kPa to PSI ConverterkPa to psi and back, with a chart.
- PSI to kPa ConverterPSI to kpa and back, with a chart.
- kJ to kcal ConverterKilojoules to calories (kcal) and back, with a chart.
- kcal to kJ ConverterCalories (kcal) to kilojoules and back, with a chart.
- HP to kW ConverterHorsepower to kilowatts and back, with a chart.
- kW to HP ConverterKilowatts to horsepower and back, with a chart.
- Milliliters to Ounces ConvertermL to fluid ounces and back, with a chart.
- Ounces to Milliliters ConverterFluid ounces to mL and back, with a chart.
- Liters to Gallons ConverterLiters to US gallons and back, with a chart.
- Gallons to Liters ConverterUS gallons to liters and back, with a chart.
- Degrees to Radians ConverterDegrees to radians and back, with common angles.
- Radians to Degrees ConverterRadians to degrees and back, with a chart.
- Color ConverterHEX, RGB and HSL color codes, with contrast.