Conversions
Unit Converters
The most-searched unit pairs, kept small and precise. Every conversion factor is exact and cited — not a rounded approximation.
Area Converter — m², ft², acres, hectares
Energy Converter — joules, kWh, calories, BTU, eV
Length Converter — cm, inches, feet, metres, km, miles
Power Converter — W, kW, HP, BTU/hr, tons of refrigeration
Pressure Converter — PSI, bar, kPa, Pa, atm, mmHg
Speed Converter — km/h, mph, m/s, knots, Mach
Temperature Converter — °C, °F, Kelvin
Volume Converter — litres, gallons, ml, fl oz, cups
Weight & Mass Converter — kg, lbs, oz, grams, stones