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Speed Converter
Convert between km/h, mph, knots, m/s and ft/s. Useful for driving, aviation, sailing and physics problems.
Conversion Formula
1 km/h = 0.277778 m/s · 1 mph = 1.609344 km/h · 1 knot = 1.852 km/h · 1 m/s = 3.6 km/h
Common Speed Converter Reference
| From | Equals | Also |
|---|
| 1 km/h | 0.621371 mph | 0.539957 knots |
| 1 mph | 1.609344 km/h | 0.868976 knots |
| 1 knot | 1.852 km/h | 1.15078 mph |
| 1 m/s | 3.6 km/h | 2.23694 mph |
| 100 km/h | 62.1371 mph | 53.9957 knots |
| 60 mph | 96.5606 km/h | 52.1386 knots |
How to Convert Speed
- Enter the value you want to convert.
- Choose the From unit.
- Choose the To unit.
- Click Convert to see the result instantly.
Frequently Asked Questions
How many km/h is 1 mph?+
1 mph = 1.609344 km/h (exact).
How do I convert km/h to mph?+
Multiply by 0.621371. Example: 100 km/h = 62.14 mph.
What is a knot?+
A knot is one nautical mile per hour, equal to 1.852 km/h or 0.514444 m/s.
How fast is 100 km/h in m/s?+
100 km/h = 27.778 m/s.
How fast is the speed of sound?+
About 343 m/s (1,235 km/h) in dry air at 20 °C.
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