Speed Converter
Convert speeds between kilometres per hour, miles per hour, metres per second, knots and feet per second.
- Kilometres per hour
- –
- Metres per second
- –
- Miles per hour
- –
- Feet per second
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- Knots
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How it is calculated
- Everything is converted through metres per second.
- 1 km/h = 1,000 m ÷ 3,600 s; 1 mph = 1,609.344 m ÷ 3,600 s; 1 knot = 1 nautical mile (1,852 m) per hour.
Worked example
| You enter | |
|---|---|
| Value | 1 |
| From | Kilometres per hour (km/h) |
| You get | |
| Kilometres per hour | 1 km/h |
| Metres per second | 0.277778 m/s |
| Miles per hour | 0.621371 mph |
| Feet per second | 0.911344 ft/s |
| Knots | 0.539957 kn |
1 km/h equals 0.621371 mph, 0.911344 ft/s, 0.539957 kn.
Sources and checks
Last checked: 12 October 2026. This calculator passes 4 automatic tests before every release.
Your numbers never leave your device: the calculation runs in your browser and nothing you type is sent or stored.
Conversions use exact legal definitions where they exist. Results are rounded for display. Results are estimates for information only and are not financial, tax or legal advice. Check important figures with a qualified professional before you act on them.