Kilometres an hour to miles an hour
Convert kilometres an hour to miles an hour. To convert kilometres an hour to miles an hour, divide by 1.609.
Factors from their legal definitions.
Result
100 kilometres an hour is 62.137 miles an hour.
| One kilometre an hour | 0.6214 mph |
|---|---|
| One mile an hour | 1.609 km/h |
Show the workings
| Step | Sum | Answer |
|---|---|---|
| One mile an hour in kilometres an hour | 1760 × 0.9144 m ÷ 1,000 | 1.609 km/h |
| In miles an hour | 100 ÷ 1.609 | 62.137 mph |
Where the figures come from
- A yard in metres: 0.914 m per yard. Source: Weights and Measures Act 1985, Schedule 1. Checked 13 November 2026.
- Yards in a mile: 1,760 yards per mile. Source: Weights and Measures Act 1985, Schedule 1. Checked 13 November 2026.
Kilometres an hour to miles an hour table
| Kilometres an hour | Miles an hour |
|---|---|
| 0.5 km/h | 0.3107 mph |
| 1 km/h | 0.6214 mph |
| 2 km/h | 1.243 mph |
| 3 km/h | 1.864 mph |
| 4 km/h | 2.485 mph |
| 5 km/h | 3.107 mph |
| 6 km/h | 3.728 mph |
| 7 km/h | 4.35 mph |
| 8 km/h | 4.971 mph |
| 9 km/h | 5.592 mph |
| 10 km/h | 6.214 mph |
| 12 km/h | 7.456 mph |
| 15 km/h | 9.321 mph |
| 20 km/h | 12.427 mph |
| 25 km/h | 15.534 mph |
| 30 km/h | 18.641 mph |
| 40 km/h | 24.855 mph |
| 50 km/h | 31.069 mph |
| 75 km/h | 46.603 mph |
| 100 km/h | 62.137 mph |
How to convert kilometres an hour to miles an hour
One kilometre an hour is 0.6214 miles an hour, and one mile an hour is 1.609 kilometres an hour. So to turn kilometres an hour into miles an hour, divide by 1.609. For example, 100 kilometres an hour ÷ 1.609 = 62.137 miles an hour.
Where the numbers come from
Imperial units are defined in law as exact amounts of metric ones. These are the definitions this converter uses:
- A yard in metres: 0.914 m per yard. Source: Weights and Measures Act 1985, Schedule 1.
- Yards in a mile: 1,760 yards per mile. Source: Weights and Measures Act 1985, Schedule 1.