How to use Speed Converter
- Type the value you want to convert.
- Choose the unit you are converting from and the unit you want.
- Read the result instantly – every other unit is listed in the table below it.
- Use “Copy” to copy the result, or “Swap” to convert the other way.
Common speed conversions
| From | Equals |
|---|---|
| 1 Kilometres per hour (km/h) | 0.6213711922 mph (Miles per hour) |
| 1 Miles per hour (mph) | 1.609344 km/h (Kilometres per hour) |
| 1 Metres per second (m/s) | 3.6 km/h (Kilometres per hour) |
| 1 Knot (kn) | 1.852 km/h (Kilometres per hour) |
| 1 Knot (kn) | 1.150779448 mph (Miles per hour) |
| 1 Feet per second (ft/s) | 0.3048 m/s (Metres per second) |
Kilometres per hour to Miles per hour table
| Kilometres per hour (km/h) | Miles per hour (mph) |
|---|---|
| 1 km/h | 0.6213711922 mph |
| 2 km/h | 1.242742384 mph |
| 5 km/h | 3.106855961 mph |
| 10 km/h | 6.213711922 mph |
| 20 km/h | 12.42742384 mph |
| 25 km/h | 15.53427981 mph |
| 50 km/h | 31.06855961 mph |
| 100 km/h | 62.13711922 mph |
| 500 km/h | 310.6855961 mph |
| 1,000 km/h | 621.3711922 mph |
Units in this converter
Metres per second (m/s), Kilometres per hour (km/h), Miles per hour (mph), Knot (kn), Feet per second (ft/s), Kilometres per second (km/s).
Examples
- 100 km/h = 62.14 mph
- 10 m/s = 36 km/h
- 1 knot = 1.852 km/h
Supported formats
| Input | Number |
|---|---|
| Output | Converted value, Full conversion table |
| Processing | On your device, in the browser (no upload) |
Limitations to know
- Mach number depends on air temperature and altitude, so it is not included.
- Results are shown to up to 10 significant digits; extremely large or small values switch to scientific notation (e.g. 1.5e-12).
Privacy: Speed Converter runs entirely in your web browser. Your Number data is not uploaded, stored or shared, and nothing about its contents is sent to analytics.
Frequently asked questions
How do I convert km/h to mph?
Divide by 1.609344. For example, 120 km/h ÷ 1.609344 = 74.56 mph.
What is a knot?
A knot is one nautical mile per hour, exactly 1.852 km/h. It is used at sea and in aviation.
References
Last updated · Maintained by the ZippyToolkit team