Speed Converter
Convert between metric (m/s, km/h), imperial (mph), nautical (knot), and mach speed units.
Convert Units
Unit Reference
Metric
- 1 km/h = 0.2778 m/s
- 1 m/s = 3.6 km/h
- Walking: ~5 km/h
Imperial / US
- 1 mph = 1.609 km/h
- 1 mph = 0.4470 m/s
- Car limit: ~60 mph (US)
Other
- 1 knot = 1.852 km/h
- Mach 1 = 343 m/s
- Mach 1: at 20°C, sea level
About Speed Conversion
Use this tool to quickly convert between various speed units including metric (m/s, km/h), imperial (mph), nautical (knot), and mach. All calculations are performed in your browser and no data is sent to any server.