Converters
Speed converter
Convert between km/h, mph, m/s, knots and ft/s, live.
- Instant
- Free
- Private (processed locally)
- No sign-up
Every speed unit, live
Type a speed in the km/h, mph, m/s, knots or ft/s field: the others compute instantly. Handy for driving abroad, sports or navigation.
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Pick a field
The starting unit.
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Type the value
Decimals accepted.
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Read the equivalents
Updated live.
Useful conversions
- 1 km/h = 0.2778 m/s
- 1 mph = 1.609 km/h
- 1 knot = 1.852 km/h
- 1 m/s = 3.6 km/h
Reference speeds
| Activity | km/h | mph |
|---|---|---|
| Walking | 5 | 3.11 |
| Running | 12 | 7.46 |
| City driving | 50 | 31.07 |
| Airliner | 900 | 559.23 |
Exact conversions via m/s as reference, display rounded to two decimals. 100% local calculation.
Frequently asked questions
Which units are supported?
Kilometres per hour (km/h), miles per hour (mph), metres per second (m/s), knots (nautical mile/h) and feet per second (ft/s).
What is 100 km/h in mph?
About 62.14 mph. Conversely, 60 mph ≈ 96.56 km/h. The calculation uses m/s as the reference.
What is a knot?
A knot equals one nautical mile per hour, exactly 1.852 km/h. It is the speed unit used in maritime and air navigation.
Is my data private?
Yes. Everything is computed in your browser; nothing is sent.