MPH to km/h table
| mph | km/h |
|---|---|
| 5 mph | 8 km/h |
| 10 mph | 16.1 km/h |
| 15 mph | 24.1 km/h |
| 20 mph | 32.2 km/h |
| 25 mph | 40.2 km/h |
| 30 mph | 48.3 km/h |
| 35 mph | 56.3 km/h |
| 40 mph | 64.4 km/h |
| 45 mph | 72.4 km/h |
| 50 mph | 80.5 km/h |
| 55 mph | 88.5 km/h |
| 60 mph | 96.6 km/h |
| 65 mph | 104.6 km/h |
| 70 mph | 112.7 km/h |
| 75 mph | 120.7 km/h |
| 80 mph | 128.7 km/h |
| 85 mph | 136.8 km/h |
| 100 mph | 160.9 km/h |
US and UK speed limits in km/h
- 20 mph (UK urban zones) = 32 km/h
- 25–30 mph (US residential / UK built-up areas) = 40–48 km/h
- 55 mph (many US highways) = 89 km/h
- 65–70 mph (most US interstates; UK motorways are 70 mph) = 105–113 km/h
- 75–80 mph (rural interstates in several western US states) = 121–129 km/h
Limits vary by state and road — always follow the posted signs.
Quick estimate
Multiply by 1.6: 50 mph ≈ 80 km/h. A handy anchor: 62 mph ≈ 100 km/h, the benchmark used for 0–100 km/h acceleration times.
Treadmill and running speeds
A treadmill at 6 mph is 9.66 km/h, a 10:00 min/mile pace (6:13 min/km). See the treadmill speed to pace table.
Frequently asked questions
How fast is 60 mph in km/h?
60 mph is 96.56 km/h.
How fast is 70 mph in km/h?
70 mph is 112.65 km/h, the UK motorway speed limit.
How do I convert mph to km/h?
Multiply by 1.609344 (or about 1.6).