User-Friendly Calculators & Converters
TheCalculatorKing.com is a site dedicated to providing free, easy-to-use calculators and measurement converters for everyone. Some examples of our popular calculators and converters are below.
Calculators
Converters
Area
Square Kilometer (km²) Converters
Square Centimeter (cm²) Converters
Square Millimeter (mm²) Converters
Energy
Kilowatt Hour (kWh) Converters
Megawatt Hour (MWh) Converters
British Thermal Unit (Btu) Converters
Frequency
Revs Per Second (rps) Converters
Revs Per Minute (rpm) Converters
Revs Per Hour (rph) Converters
Radians Per Second (rad/s) Converters
Radians Per Minute (rad/min) Converters
Radians Per Hour (rad/h) Converters
Degrees Per Second (°/s) Converters
Power
Decibel-milliwatt (dBm) Converters
Imperial Horsepower (hp(I)) Converters
Speed
Foot Per Second (ft/s) Converters
Foot Per Minute (ft/m) Converters
Foot Per Hour (ft/h) Converters
Kilometer Per Second (km/s) Converters
Kilometer Per Minute (km/m) Converters
Kilometer Per Hour (km/h) Converters
Knots (kn, Kt) (UK) Converters
Meter Per Second (m/s) Converters
Meter Per Minute (m/min) Converters
Meter Per Hour (m/h) Converters
Mile Per Second (mi/s) Converters
Mile Per Minute (mi/m) Converters
Mile Per Hour (mph) Converters
Yard Per Second (yd/s) Converters
Yard Per Minute (yd/m) Converters