Speed Converter
Convert speed between kilometers per hour, miles per hour, meters per second, and knots, whether for road speeds, physics problems, or marine and aviation speeds.
Formula: multiply the source value by 0.62137119
Quick Conversions
About this tool
Speed is distance over time. All values are converted through meters per second.
How to use it
Enter a speed, choose units, and read the converted value instantly.
value_to = value_from Ă (from_in_m/s / to_in_m/s)
Examples
100 km/h to mph
100 Ă 0.621371 â 62.137 mph.
100 km/h to mph
100 Ă 0.621371 = 62.1371 mph.
10 m/s to km/h
10 Ă 3.6 = 36 km/h.
Every unit expressed in kilometers per hour
| Unit | Equal to (km/h) |
|---|---|
| 1 kilometer per hour (km/h) | 1 |
| 1 mile per hour (mph) | 1.609344 |
| 1 meter per second (m/s) | 3.6 |
| 1 knot (kn) | 1.852 |
FAQ
What is a knot?
One nautical mile per hour, or 1.852 km/h.
How do I get m/s from km/h?
Divide km/h by 3.6.
Is the conversion exact?
Yes, before rounding. Each unit is an exact distance (1 km, 1,609.344 m, 1 m, or 1,852 m) over an exact time, so the factors are exact ratios.