Speed Converter

Speed conversion is used in automotive, aviation, maritime, and scientific contexts. Our free speed converter covers everything from everyday driving speeds to the speed of light, supporting professional and educational use.

Supported Speed Units

Common: Meter per second (m/s), Kilometer per hour (km/h), Mile per hour (mph), Foot per second (ft/s), Knot (kn). Scientific: Speed of Light (c), Mach (speed of sound at sea level), Centimeter per second (cm/s). Other: Mile per minute, Kilometer per minute, Foot per minute.

Common Speed Conversions

1 km/h = 0.621371 mph = 0.277778 m/s. 1 mph = 1.60934 km/h = 0.44704 m/s. 1 knot = 1.852 km/h = 1.15078 mph. 1 Mach ≈ 340.29 m/s = 1,225 km/h at sea level. Speed of light = 299,792,458 m/s = 1,079,252,848 km/h.

Speed in Context

Walking speed: ~5 km/h (3.1 mph). Cycling: ~25 km/h (15.5 mph). Highway driving: ~120 km/h (74.6 mph). Commercial jet: ~900 km/h (559 mph, ~0.85 Mach). Space shuttle orbital: ~28,000 km/h (17,398 mph).