Speed Converter
Convert speed between km/h, mph, m/s, knots, ft/s and Mach. Free online speed unit converter.
Frequently asked questions
- Which speed units are supported?
- Meters per second, kilometers per hour, miles per hour, knots, feet per second and Mach.
- What Mach value is used?
- Mach 1 is taken as 340.29 m/s, the speed of sound at sea level in standard conditions.
- Is the conversion exact?
- Yes, each unit is stored as an exact factor of meters per second, then rounded for display.
- Does it work for running pace?
- No, this converts speed units. For minutes per kilometer or mile, use a running pace calculator instead.
This tool runs entirely in your browser. No data is uploaded anywhere.