1 kilometer per hour = 0.621371 miles per hour
Convert kilometers per hour to miles per hour.
Both directions on one page — swap the units and the whole thing runs backwards.
Type a value, or “5cm to in”
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The formula
mph = km/h × 0.621371
Worked through with a real value: 10 kilometers per hour = 6.21371 miles per hour.
Going the other way: km/h = mph × 1.60934, so 1 mile per hour = 1.60934 kilometers per hour.
What each unit is
- kilometer per hour km/h
- How many kilometres are covered each hour, the standard road speed unit nearly everywhere outside the USA and UK.
- mile per hour mph
- How many miles are covered each hour, used for road speeds in the USA, UK, and a few other countries.
Where these come from
- 1 kilometer per hour = 0.2777777777777778 meters per second
- 1 mile per hour = 0.44704 meters per second
Every other number on this page is computed from those, and each category is pinned to conversions worked out by hand from the units' primary definitions before it ships.
Conversion tables
| kilometers per hour (km/h) | miles per hour (mph) |
|---|---|
| 1 | 0.621371 |
| 2 | 1.24274 |
| 3 | 1.86411 |
| 4 | 2.48548 |
| 5 | 3.10686 |
| 6 | 3.72823 |
| 7 | 4.3496 |
| 8 | 4.97097 |
| 9 | 5.59234 |
| 10 | 6.21371 |
| 20 | 12.4274 |
| 25 | 15.5343 |
| 50 | 31.0686 |
| 75 | 46.6028 |
| 100 | 62.1371 |
| miles per hour (mph) | kilometers per hour (km/h) |
|---|---|
| 1 | 1.60934 |
| 2 | 3.21869 |
| 3 | 4.82803 |
| 4 | 6.43738 |
| 5 | 8.04672 |
| 6 | 9.65606 |
| 7 | 11.2654 |
| 8 | 12.8748 |
| 9 | 14.4841 |
| 10 | 16.0934 |
| 20 | 32.1869 |
| 25 | 40.2336 |
| 50 | 80.4672 |
| 75 | 120.701 |
| 100 | 160.934 |
Questions
How many miles per hour are in a kilometer per hour?
1 kilometer per hour = 0.621371 miles per hour.
How do I convert kilometers per hour to miles per hour?
Use mph = km/h × 0.621371. For example, 10 kilometers per hour = 6.21371 miles per hour.
How many kilometers per hour are in one mile per hour?
1 mile per hour = 1.60934 kilometers per hour.
What is 10 kilometers per hour in miles per hour?
10 kilometers per hour = 6.21371 miles per hour.
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