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.
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.