Speed Converters
Convert speed units for driving, cycling, aviation, boating, running, and science work. Each focused converter includes the calculator, formula, examples, and a quick reference table.
Popular Speed Converters
MPH to KPHConvert miles per hour into kilometers per hour for road speeds and travel.Open converter
KPH to MPHConvert kilometers per hour into miles per hour for US-style speed readings.Open converter
MPH to MPSTurn miles per hour into meters per second for physics and engineering work.Open converter
MPS to MPHConvert meters per second back into miles per hour.Open converter
Knots to MPHUseful for marine, aviation, and weather-related speed readings.Open converter
MPH to KnotsConvert road-speed style values into knots.Open converter
How speed conversion works
Speed conversion compares distance over time. The units change, but the motion being measured stays the same. For example, miles per hour can be converted to kilometers per hour by multiplying by 1.60934.
Speed Converters FAQs
What is the difference between mph and kph?
MPH measures miles per hour, while KPH measures kilometers per hour. One mile is longer than one kilometer, so the numbers are different for the same speed.
When should I use meters per second?
Meters per second is common in science, engineering, and physics because it uses SI base units.
Are knots only for boats?
No. Knots are used in marine navigation, aviation, and weather reports, especially for wind speed.