MPH to KM/H Converter
The ×1.609 direction — US limits and treadmill dials into metric.
Type in either field — the other updates instantly.
MPH to KM/H chart
| mph | km/h |
|---|---|
| 3 mph | 4.83 km/h |
| 5 mph | 8.05 km/h |
| 6.2 mph | 9.98 km/h |
| 10 mph | 16.09 km/h |
| 15 mph | 24.14 km/h |
| 20 mph | 32.19 km/h |
| 25 mph | 40.23 km/h |
| 30 mph | 48.28 km/h |
| 45 mph | 72.42 km/h |
| 55 mph | 88.51 km/h |
| 60 mph | 96.56 km/h |
| 65 mph | 104.61 km/h |
| 70 mph | 112.65 km/h |
| 80 mph | 128.75 km/h |
| 100 mph | 160.93 km/h |
| 155 mph | 249.45 km/h |
| 200 mph | 321.87 km/h |
6.2 mph is the 10 km/h jog; 155 mph is where hypercars meet German autobahn lore.
How this is calculated
km/h = mph × 1.609344 (exact)
Reading American or British speeds in metric: a 70 mph motorway limit is 112.65 km/h, a US interstate 65 is 104.6 km/h, and a 7.5 mph treadmill run is 12.07 km/h. Same exact factor as the distance pages, applied per hour.
Because the mile is exactly 1,609.344 m, speed conversion inherits the same exactness. Hurricane categories and aviation winds are usually quoted in knots — a different unit (1 knot = 1.852 km/h) this page deliberately does not mix in.
Miles per hour to kilometres per hour is the direction of an imperial driver abroad, and of anyone reading American vehicle specifications into a metric context. The common limits translate awkwardly: 70 mph is 112.7 km/h, and 30 mph is 48.3 km/h, which is why British urban limits look like odd numbers when expressed metrically.
Multiply by 1.609. Since speed cameras and enforcement tolerances are applied in the local unit, converting and then rounding generously is a poor plan — the tolerance is on their number, not yours. Convert exactly and drive to the posted figure.
Frequently asked questions
What is 70 mph in km/h?
112.65 km/h — the UK motorway limit. US interstates at 65–75 mph span 104.6–120.7 km/h, which is why 110–120 feels familiar across borders.
What treadmill speed is a 5:00/km pace?
12 km/h — which is 7.46 mph on a US treadmill dial. For pace math in miles, 8:00/mile equals 7.5 mph exactly.
Are knots the same as mph?
No — a knot is one nautical mile (1,852 m) per hour: 1 knot = 1.15078 mph = 1.852 km/h. Aviation and sailing use knots; this page converts road-and-treadmill mph only.
Why 1.609344 and not 1.6?
The mile is 5,280 × 0.3048 m exactly. The 0.6% gap between 1.6 and the truth is invisible at jogging speeds and about 1 km/h at highway speeds.