miles per hour to kilometers per hour converter
Language
Convert miles per hour (mph) to kilometers per hour (km/h), or reverse the calculation. Use the calculator, formula, worked example and conversion table below.
miles per hour to kilometers per hour converter
How to use this calculator
- Enter the value in the input unit. Decimal values are supported.
- Select the unit definition when a choice is available. Changing the input updates the result.
- Use Swap direction to convert back. The previous result becomes the new input.
Conversion formula
kilometers per hour (km/h) = miles per hour (mph) × 1.609344
For example: 60 miles per hour (mph) = 96.56064 kilometers per hour (km/h).
Reverse formula
miles per hour (mph) = kilometers per hour (km/h) ÷ 1.609344
Conversion table
The formula, worked example and table use the first unit definition and the direction shown in the title. The calculator also supports the reverse direction.
| miles per hour (mph) | kilometers per hour (km/h) |
|---|---|
| 0 | 0 |
| 0.5 | 0.804672 |
| 1 | 1.609344 |
| 2 | 3.218688 |
| 5 | 8.04672 |
| 10 | 16.09344 |
| 20 | 32.18688 |
| 50 | 80.4672 |
| 60 | 96.56064 |
| 100 | 160.9344 |
Frequently asked questions
Can I convert in both directions?
Yes. Use Swap direction to exchange the input and output units without opening another page.
Precision and rounding
Results are displayed with up to eight decimal places. Very small or large values use scientific notation. The calculation uses the stored conversion factor; displayed figures may be rounded. Converting units does not improve the accuracy of the original measurement.
Reference: NIST unit conversion guide
