KPH to MPH converter
Type a speed in kilometers per hour (km/h) or miles per hour (mph) and get the other value instantly. Exact factors: 1 km/h = 0.2777777778 m/s and 1 km/h = 0.621371192 mph.
Converter tool
Formula: mph = km/h ÷ 1.609344
Quick examples
| KM/H | MPH |
|---|---|
| 10 | 6.21 |
| 20 | 12.43 |
| 30 | 18.64 |
| 50 | 31.07 |
| 60 | 37.28 |
| 70 | 43.50 |
| 90 | 55.92 |
| 100 | 62.14 |
| 120 | 74.56 |
How to convert km/h to mph
Formula: mph = km/h ÷ 1.609344. This is exact because 1 mile = 1609.344 meters and 1 kilometer = 1000 meters.
Reverse conversion: to get km/h from mph, multiply by 1.609344 (km/h = mph × 1.609344).
Rule of thumb: for quick mental math, divide by ~1.6. Example: 100 km/h ÷ 1.6 ≈ 62.5 mph (exact is 62.14 mph).
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KPH → MPH FAQs
What is the exact conversion from km/h to mph?
Exactly 1 km/h = 0.621371192 mph, which is the same as dividing by 1.609344.
How do I convert 100 km/h to mph?
100 ÷ 1.609344 = 62.14 mph.
How do I go back from mph to km/h?
Multiply by 1.609344. Example: 60 mph × 1.609344 ≈ 96.56 km/h.
Is dividing by 1.6 good enough?
It’s fine for estimates. For exact values, use 1.609344.