About This Calculator
This mph to km/h calculator allows you to convert speeds between miles per hour (mph) and kilometers per hour (km/h). It’s commonly used in vehicle speed comparisons, driving regulations, and mechanical system analysis across countries.
How It Works
The formulas used for conversion are:
km/h = mph × 1.60934
mph = km/h ÷ 1.60934
Frequently Asked Questions
How do I convert mph to km/h?
Multiply the speed in mph by 1.60934.
Is this conversion accurate?
Yes, the calculator uses the precise conversion factor 1 mile = 1.60934 kilometers.
When do I need to convert between mph and km/h?
This is useful when comparing speed limits or vehicle speeds between the US (mph) and most other countries (km/h).
mph to km/h Conversion Table
| mph | km/h |
|---|---|
| 5 mph | 8.05 km/h |
| 10 mph | 16.09 km/h |
| 20 mph | 32.19 km/h |
| 30 mph | 48.28 km/h |
| 40 mph | 64.37 km/h |
| 50 mph | 80.47 km/h |
| 60 mph | 96.56 km/h |
| 70 mph | 112.65 km/h |
| 80 mph | 128.75 km/h |
| 90 mph | 144.84 km/h |
| 100 mph | 160.93 km/h |
| 120 mph | 193.12 km/h |
km/h to mph Conversion Table
| km/h | mph |
|---|---|
| 10 km/h | 6.21 mph |
| 20 km/h | 12.43 mph |
| 30 km/h | 18.64 mph |
| 40 km/h | 24.85 mph |
| 50 km/h | 31.07 mph |
| 60 km/h | 37.28 mph |
| 80 km/h | 49.71 mph |
| 100 km/h | 62.14 mph |
| 120 km/h | 74.56 mph |
| 150 km/h | 93.21 mph |
| 180 km/h | 111.85 mph |
| 200 km/h | 124.27 mph |