Speed Converter
Convert speed between mph, km/h, m/s and knots - with running and cycling pace shown in minutes per km and per mile.
Running / cycling pace
Most-searched conversions
| From | Equals |
|---|---|
| 1 mph | 1.609 km/h |
| 1 km/h | 0.6214 mph |
| 1 m/s | 3.6 km/h (2.237 mph) |
| 1 knot | 1.852 km/h (1.151 mph) |
| 60 mph | 96.56 km/h |
| 100 km/h | 62.14 mph |
How speed conversion works
Every speed converts through one base unit - meters per second. Each unit has a fixed factor: 1 km/h is 0.2778 m/s, 1 mph is 0.44704 m/s, 1 knot is 0.51444 m/s. The tool turns your value into m/s, then divides by the target unit's factor. So 60 mph becomes 26.82 m/s, then 26.82 / 0.2778 = 96.56 km/h. Because the maths is a single multiply and divide, the answer updates the moment you type.
Pace instead of speed
Runners and cyclists usually think in pace - how long it takes to cover one kilometer or mile - rather than raw speed. Pace is just the inverse: at 12 km/h you cover a kilometer in 60 / 12 = 5 minutes, shown as 5:00 min/km. The panel above turns whatever speed you enter into both min/km and min/mile, so an 8 mph treadmill setting instantly reads as a 7:30 min/mile pace.
Common speeds for reference
- Brisk walk: about 5 km/h (3.1 mph), a pace of 12:00 min/km.
- Marathon world record pace: roughly 20.9 km/h, near 2:52 min/km.
- UK motorway limit: 70 mph is 112.7 km/h.
- Cruising airliner: around 500 knots, which is 926 km/h.
For distances rather than speeds, use the length converter; to work out how long a journey costs, try the fuel cost calculator; and the unit converter bundles speed with every other measure in one place.
Popular conversions
- miles per hour to kilometers per hour (mph to km/h) - 1 mph = 1.60934 km/h
- kilometers per hour to miles per hour (km/h to mph) - 1 km/h = 0.621371 mph