All conversions

Every unit conversion, in one place

Browse 49 dedicated calculator pages — each with a working calculator, formula, worked example, and full reference chart.

📏Length

in→cmInches to Centimeters cm→inCentimeters to Inches ft→mFeet to Meters m→ftMeters to Feet mi→kmMiles to Kilometers km→miKilometers to Miles yd→mYards to Meters m→ydMeters to Yards mm→inMillimeters to Inches in→mmInches to Millimeters

⚖️Weight

kg→lbKilograms to Pounds lb→kgPounds to Kilograms g→ozGrams to Ounces oz→gOunces to Grams st→kgStones to Kilograms kg→stKilograms to Stones

🌡️Temperature

°C→°FCelsius to Fahrenheit °F→°CFahrenheit to Celsius °C→KCelsius to Kelvin °F→KFahrenheit to Kelvin

🧪Volume

mL→fl ozMilliliters to Fluid Ounces (US)fl oz→mLFluid Ounces (US) to Milliliters L→galLiters to Gallons (US)gal→LGallons (US) to Liters gal→LGallons (UK) to Liters L→galLiters to Gallons (UK)cup→mLCups (US) to Milliliters mL→cupMilliliters to Cups (US)tbsp→tspTablespoons to Teaspoons tbsp→cupTablespoons to Cups (US)

⬛Area

ft²→m²Square Feet to Square Meters m²→ft²Square Meters to Square Feet ac→haAcres to Hectares ha→acHectares to Acres

🏃Speed

mph→km/hMiles per Hour to Kilometers per Hour km/h→mphKilometers per Hour to Miles per Hour kn→mphKnots to Miles per Hour

🧯Pressure

psi→barPSI to Bar bar→psiBar to PSI

🔌Power

W→hpWatts to Horsepower hp→WHorsepower to Watts hp→kWHorsepower to Kilowatts kW→hpKilowatts to Horsepower

⚡Energy

cal→JCalories to Joules J→calJoules to Calories kJ→kcalKilojoules to Kilocalories kcal→kJKilocalories to Kilojoules

🥊Force

N→lbfNewtons to Pound-force lbf→NPound-force to Newtons