Speed Converter Privacy: All processing runs locally
Convert between meters per second, kilometers per hour, miles per hour, knots, and feet per second.
How It Works
The Speed Converter converts between five commonly used speed units. All conversions go through meters per second (m/s) as the base unit.
- m/s — SI unit of speed
- km/h — 1 km/h = 1/3.6 m/s
- mph — 1 mph = 0.44704 m/s (exact)
- Knots (kn) — 1 kn = 1 nautical mile/hour = 0.514444 m/s
- ft/s — 1 ft/s = 0.3048 m/s (exact)
Common reference speeds: highway driving is typically 100–130 km/h (62–81 mph), the speed of sound at sea level is approximately 343 m/s (1,235 km/h), and a typical walking speed is about 1.4 m/s (5 km/h). All conversions are performed locally in your browser.