Speed & Power Converters
Convert between different units of speed and power with our free online converters.
KM/H to MPH
Convert kilometers per hour to miles per hour
MPH to KM/H
Convert miles per hour to kilometers per hour
Watt to KW
Convert watts to kilowatts
KW to Watt
Convert kilowatts to watts
Horsepower to Watt
Convert horsepower to watts
Ampere to Volt
Convert amperes to volts
Frequently Asked Questions
How do I convert km/h to mph?
Multiply km/h by 0.621 to get mph. Example: 100 km/h × 0.621 = 62.1 mph. Speed limits: 50 km/h = 31 mph, 100 km/h = 62 mph, 130 km/h = 81 mph.
How many watts are in a kilowatt?
1 kilowatt (kW) = 1000 watts (W). To convert kW to watts, multiply by 1000. Example: 2.5 kW × 1000 = 2500 W. Household appliances: Microwave = 1000W (1kW), AC = 1500W (1.5kW).
How do I convert horsepower to watts?
1 horsepower (HP) = 745.7 watts. Multiply HP by 745.7 to get watts. Example: 100 HP × 745.7 = 74,570 watts (74.57 kW). Car engines: 150 HP = 112 kW.
What is the difference between speed and velocity?
Speed is how fast (60 km/h). Velocity is speed with direction (60 km/h north). Speed is scalar, velocity is vector. For conversions, both use the same units (km/h, mph, m/s).
How fast is 100 mph in km/h?
100 mph = 161 km/h. Multiply mph by 1.609 to get km/h. Example: 60 mph = 97 km/h (highway speed), 70 mph = 113 km/h, 100 mph = 161 km/h.