Speed Converter
Convert between different speed units including mph, km/h, m/s, knots, and more.
Speed Conversion
Common Speeds
Speed Reference Guide
Common Speed Units
Meters per Second (m/s): SI base unit for speed
Kilometers per Hour (km/h): Common metric unit
Miles per Hour (mph): Imperial unit used in US/UK
Feet per Second (ft/s): Imperial unit for technical use
Knots: Nautical speed (1 knot = 1 nautical mile/hour)
Mach: Speed relative to sound (343 m/s at sea level)
Speed Comparisons
Human walking: ~5 km/h (3.1 mph)
Bicycle: ~20 km/h (12.4 mph)
Car (city): ~50 km/h (31 mph)
Car (highway): ~120 km/h (75 mph)
Commercial jet: ~900 km/h (560 mph)
Sound: 1,235 km/h (767 mph)