Speed Converter
Convert between meters per second, kilometers per hour, miles per hour, knots, feet per second, and Mach number.
| From | To | Result |
|---|---|---|
| 100 km/h | mph | 62.137 mph |
| 60 mph | km/h | 96.561 km/h |
| 1 m/s | km/h | 3.6 km/h |
| 1 Knot | km/h | 1.852 km/h |
| 1 Mach | km/h | 1,225 km/h |
| 1 Mach | mph | 767.269 mph |
| 30 mph | m/s | 13.411 m/s |
| 1 ft/s | km/h | 1.09728 km/h |
Frequently Asked Questions
About This Speed Converter
This free speed converter converts between metres per second, kilometres per hour, miles per hour, knots, feet per second, and Mach number. Enter a value in any unit for instant results.
When to use this converter
- Converting vehicle speed between km/h and mph
- Aviation and maritime speed in knots
- Physics problems and calculations involving velocity
Standards & References
How It Works
Enter Speed
Enter any speed value. All units convert through meters per second as the SI base unit of velocity.
Select Units
Choose from metric, imperial, nautical, and Mach speed units. Swap direction with a single click.
Instant Result
Results are displayed instantly with the conversion factor. The reference table shows common speed equivalents.
Common Use Cases
Driving & Road Trips
Convert speed limits from km/h to mph or vice versa when driving in countries that use different speed measurement systems.
Aviation
Convert airspeed between knots, mph, and km/h for flight planning, reading aviation weather reports, and pilot training.
Weather & Wind
Convert wind speed measurements from knots or m/s (common in weather reports) to mph or km/h for easier interpretation.
Sports & Athletics
Convert running, cycling, and swimming speeds between m/s, km/h, and mph for international competition comparisons.
Maritime
Convert vessel speeds between knots and km/h for shipping route planning, fuel consumption estimates, and port logistics.
Physics & Engineering
Convert between m/s and other units for mechanics problems, fluid dynamics, and engineering calculations requiring SI units.
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