Speed Converter
Free Online Speed Unit Converter - km/h, mph, m/s
Convert 7 speed units including km/h, mph, m/s, knots, and Mach.
🏎️ What is Speed?
Speed is distance traveled per unit time. Cars use km/h, aircraft use knots, science uses m/s. 1 Mach is the speed of sound (~343 m/s).
🚀 Speed Reference
100 km/h
=
62.14 mph
60 mph
=
96.56 km/h
1 m/s
=
3.6 km/h
1 knot
=
1.852 km/h
Mach 1
=
1,235 km/h
1 c
=
1,079M km/h
💡 Speed Reference
- Highway: 60-75 mph
- Airplane cruise: ~560 mph (Mach 0.85)
- Sound: 767 mph
- High-speed rail: 190 mph
- Light: 670,616,629 mph