Speed Converter
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Conversion Formula
Select units to see conversion formula
Common Conversions
Quick Reference
- 1 m/s = 3.6 km/h
- 1 km/h = 0.621371 mph
- 1 knot = 1.852 km/h
- 1 mph = 1.46667 ft/s
- 1 Mach = 343 m/s (at sea level)
- Speed of light = 299,792,458 m/s
Common Values
- Walking speed: 5 km/h
- Highway speed limit: 100 km/h
- Commercial aircraft: 900 km/h
- Sound in air: 343 m/s
- Earth’s orbit: 29.78 km/s