---
title: "Miles per hour to Kilometers per hour — mph to km/h converter"
description: "1 mile per hour = 1.609344 kilometers per hour. Conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/mph-to-kmh/
site: "At One Place"
---

# Miles per hour to kilometers per hour

**1 mile per hour in kilometers per hour: 1 mph = 1.609344 km/h**

km/h = mph × 1.609344

To convert miles per hour to kilometers per hour, multiply by 1.609344. The table below gives the values people look up most often, and the converter works for any number.

## Miles per hour to kilometers per hour table

*Common mile per hour values converted to kilometers per hour.*

| Miles per hour | Kilometers per hour |
| --- | --- |
| 1 mph | 1.609344 |
| 2 mph | 3.218688 |
| 3 mph | 4.828032 |
| 4 mph | 6.437376 |
| 5 mph | 8.04672 |
| 10 mph | 16.09344 |
| 15 mph | 24.14016 |
| 20 mph | 32.18688 |
| 25 mph | 40.2336 |
| 30 mph | 48.28032 |
| 40 mph | 64.37376 |
| 50 mph | 80.4672 |
| 75 mph | 120.7008 |
| 100 mph | 160.9344 |
| 250 mph | 402.336 |
| 500 mph | 804.672 |
| 1,000 mph | 1,609.344 |

## How the conversion works

The relationship is km/h = mph × 1.609344. Both units measure speed, so the conversion is a fixed factor that never changes.

## Common questions

### How many kilometers per hour are in one mile per hour?

One mile per hour equals 1.609344 kilometers per hour. km/h = mph × 1.609344.

### How do you convert miles per hour to kilometers per hour?

Use km/h = mph × 1.609344. So 10 mph is 16.09344 km/h.

### How many miles per hour are in one kilometer per hour?

One kilometer per hour equals 0.62137 miles per hour, which is the reverse of the conversion above.

## Related pages

- [Kilometers per hour to Miles per hour](https://atoneplace.net/convert/kmh-to-mph/)
- [Miles per hour to Meters per second](https://atoneplace.net/convert/mph-to-meters-per-second/)
- [Miles per hour to Knots](https://atoneplace.net/convert/mph-to-knots/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)