6 units
Speed Converter
Convert between km/h, mph, m/s, knots, ft/s and Mach. Useful for driving, aviation, sports and physics.
Popular speed conversions
Common speed conversions
| From | Equivalent |
|---|---|
| 1 m/s | 3.6 km/h · 2.2369 mph · 1.9438 kn · 3.2808 ft/s · 0.0029 Ma |
| 5 m/s | 18 km/h · 11.1847 mph · 9.7192 kn · 16.4042 ft/s · 0.0146 Ma |
| 10 m/s | 36 km/h · 22.3694 mph · 19.4384 kn · 32.8084 ft/s · 0.0292 Ma |
| 100 m/s | 360 km/h · 223.6936 mph · 194.3844 kn · 328.084 ft/s · 0.2915 Ma |
| 1000 m/s | 3600 km/h · 2236.9363 mph · 1943.8445 kn · 3280.8399 ft/s · 2.9155 Ma |
How the conversion works
Linear: `value × factor_from / factor_to`. Common: 1 km/h = 0.6214 mph, 1 mph = 1.609 km/h, 1 knot = 1.852 km/h.
When you'll use this converter
- Driving and traffic (mph ↔ km/h)
- Aviation and maritime (knots, Mach)
- Running, cycling and sports (km/h, mph, m/s)
- Physics and engineering (m/s)
Frequently asked
What is 60 mph in km/h?
60 mph × 1.60934 ≈ 96.56 km/h.
Why are nautical and aviation speeds in knots?
1 knot = 1 nautical mile per hour, and the nautical mile is based on Earth's geometry (1/60 of one degree of latitude), which makes navigation calculations simpler.
How fast is Mach 1?
Mach 1 is the speed of sound, ≈ 343 m/s at sea level at 20 °C. It varies with temperature and altitude.