mph to km/h Converter
1 mile per hour = 1.60934 kilometres per hour.
Enter a value
Result
1 mile per hour =
1.60934 km/h
1 mph × 1.60934 = 1.60934 km/h
1 mph = 1.609344 km/h exactly
The working
- 1. Convert 1 mph to metre per seconds: 1 × 0.44704 = 0.44704.
- 2. Convert to km/h: 0.44704 ÷ 0.277778 = 1.60934.
1 mph in every unit
Typical speeds
- Walking
- 5 km/h
- Cycling
- 20 km/h
- Motorway limit (UK)
- 70 mph
- Speed of sound
- 1,235 km/h
Conversion table
Miles per hour to Kilometres per hour
| Miles per hour | Kilometres per hour |
|---|---|
| 5 | 8.0467 |
| 10 | 16.093 |
| 20 | 32.187 |
| 30 | 48.28 |
| 40 | 64.374 |
| 50 | 80.467 |
| 60 | 96.561 |
| 70 | 112.65 |
| 80 | 128.75 |
| 90 | 144.84 |
| 100 | 160.93 |
| 120 | 193.12 |
| 150 | 241.4 |
Kilometres per hour to Miles per hour
| Kilometres per hour | Miles per hour |
|---|---|
| 5 | 3.1069 |
| 10 | 6.2137 |
| 20 | 12.427 |
| 30 | 18.641 |
| 40 | 24.855 |
| 50 | 31.069 |
| 60 | 37.282 |
| 70 | 43.496 |
| 80 | 49.71 |
| 90 | 55.923 |
| 100 | 62.137 |
| 120 | 74.565 |
| 150 | 93.206 |
Formula and worked example
kilometres per hour = miles per hour × 1.609344 (1 mph is exactly 1.609344 km/h).
Convert 60 miles per hour to kilometres per hour: 60 × 1.609344 = 96.5606 km/h.
When you need this
Converting UK and US speed limits, treadmill speeds or car top speeds into kilometres per hour.
Questions people ask
How many kilometres per hour are in a mile per hour?
One mile per hour is 1.609344 kilometres per hour. 1 mph is exactly 1.609344 km/h.
How do I convert miles per hour to kilometres per hour?
Multiply the number of miles per hour by 1.609344.
What is 60 mph in km/h?
60 miles per hour is 96.5606 kilometres per hour.
How do I convert kilometres per hour back to miles per hour?
Multiply by 0.62137119: one kilometre per hour is 0.62137119 miles per hour.
Related conversions
How we calculate this
We use the standard published formula or definition for this calculation, and we show the working so you can check it. Source: NIST Special Publication 811, Guide for the Use of the International System of Units.
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