Speed Converter
Convert between mph, km/h, m/s, ft/s, knots, and Mach. Real-time results with travel calculator.
All Units at a Glance
| Unit | Value |
|---|---|
| Miles per hour (mph) | — |
| Kilometers per hour (km/h) | — |
| Meters per second (m/s) | — |
| Feet per second (ft/s) | — |
| Knots (nmi/h) | — |
| Mach (at sea level) | — |
Travel Calculator
Common Speed Reference
| Description | mph | km/h | m/s |
|---|---|---|---|
| Average walking pace | 3 | 4.8 | 1.3 |
| Jogging / easy run | 6 | 9.7 | 2.7 |
| Competitive sprint (100m world record) | 27.8 | 44.7 | 12.4 |
| City speed limit (typical) | 25–35 | 40–56 | 11–16 |
| Highway / motorway speed | 60–75 | 97–121 | 27–34 |
| High-speed train (TGV, Shinkansen) | 200 | 322 | 89 |
| Speed of sound (sea level, 20°C) | 767 | 1235 | 343 |
| Mach 2 (fighter jet) | 1535 | 2470 | 686 |
| Low Earth orbit | 17,500 | 28,160 | 7,822 |
| Speed of light | 670,616,629 | 1,079,252,848 | 299,792,458 |
How to use
- Enter a speed value in either field and select the units — the result updates instantly
- Use the ⇄ button to swap the from and to units
- The "All Units at a Glance" table shows your entered speed in every unit simultaneously
- Distance → Time: Enter a distance and speed to calculate travel time
- Time → Distance: Enter a duration and speed to calculate distance covered
- Mach speed uses 343 m/s (speed of sound at sea level, approximately 20°C)
About this Speed Converter
Use this free speed converter to convert miles per hour, kilometers per hour, meters per second, knots, and other speed units. It is useful for travel, sports, weather, vehicles, and science tasks. No signup is required, and the tool works on phones, tablets, and desktop browsers.