How to use
Enter a speed and pick the units — the result and a table in every speed unit appear instantly.
Definitions
- 1 mph = 1.609344 km/h; 1 km/h ≈ 0.6214 mph.
- 1 m/s = 3.6 km/h ≈ 2.237 mph.
- 1 knot = 1 nautical mile per hour = 1.852 km/h ≈ 1.151 mph.
Examples
- 60 mph = 96.56 km/h.
- 100 km/h (a common speed limit abroad) = 62.14 mph; 130 km/h = 80.78 mph.
- A 10 m/s wind = 36 km/h ≈ 22.4 mph.
FAQ
How do I convert km/h to mph in my head? For a rough estimate, multiply by 5 and divide by 8: 100 km/h → 62.5 mph (about 62.14 mph using the exact conversion).
What’s a knot? One nautical mile (1,852 m) per hour — used for wind, boats and aircraft.
For running speeds, the running pace calculator shows pace per mile.