How to convert mph to km/h
km/h = mph × 1.609344
For example, 70 mph is 70 × 1.609344 = 112.7 km/h.
Mph to km/h conversion table
| Mph (mph) | Km/h (km/h) |
|---|---|
| 5 | 8 |
| 10 | 16.1 |
| 20 | 32.2 |
| 30 | 48.3 |
| 40 | 64.4 |
| 50 | 80.5 |
| 60 | 96.6 |
| 62 | 99.8 |
| 70 | 112.7 |
| 75 | 120.7 |
| 80 | 128.7 |
| 90 | 144.8 |
| 100 | 160.9 |
| 120 | 193.1 |
| 150 | 241.4 |
| 155 | 249.4 |
| 200 | 321.9 |
UK speed limits in km/h
| UK limit | In km/h | Where |
|---|---|---|
| 20 mph | 32 km/h | Many residential streets, default in Wales |
| 30 mph | 48 km/h | Built-up areas with street lights |
| 60 mph | 97 km/h | Single carriageways |
| 70 mph | 113 km/h | Dual carriageways and motorways |
See the full rules, including towing limits, in our UK speed limits guide. Many performance cars are limited to 155 mph, which is about 250 km/h.
Sources
Rates and rules last checked 15 October 2026. These figures are a guide. For a decision that matters, confirm with the official source.