Speed Unit Conversion
Convert between miles per hour (mph), kilometers per hour (km/h), meters per second (m/s), knots, and feet per second.
Quick Reference
- 1 mph = 1.60934 km/h
- 1 km/h = 0.621371 mph
- 1 m/s = 3.6 km/h = 2.237 mph
- 1 knot = 1.852 km/h = 1.151 mph
- Speed of sound ≈ 343 m/s = 1,235 km/h = 767 mph
- Speed of light ≈ 299,792,458 m/s