---
title: "Kilometers per hour to Miles per hour — km/h to mph converter"
description: "1 kilometer per hour = 0.62137 miles per hour. Conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/kmh-to-mph/
site: "At One Place"
---

# Kilometers per hour to miles per hour

**1 kilometer per hour in miles per hour: 1 km/h = 0.62137 mph**

mph = km/h × 0.6213711922

To convert kilometers per hour to miles per hour, multiply by 0.6213711922. The table below gives the values people look up most often, and the converter works for any number.

## Kilometers per hour to miles per hour table

*Common kilometer per hour values converted to miles per hour.*

| Kilometers per hour | Miles per hour |
| --- | --- |
| 1 km/h | 0.62137 |
| 2 km/h | 1.242742 |
| 3 km/h | 1.864114 |
| 4 km/h | 2.485485 |
| 5 km/h | 3.106856 |
| 10 km/h | 6.213712 |
| 15 km/h | 9.320568 |
| 20 km/h | 12.42742 |
| 25 km/h | 15.53428 |
| 30 km/h | 18.64114 |
| 40 km/h | 24.85485 |
| 50 km/h | 31.06856 |
| 75 km/h | 46.60284 |
| 100 km/h | 62.13712 |
| 250 km/h | 155.3428 |
| 500 km/h | 310.6856 |
| 1,000 km/h | 621.3712 |

## How the conversion works

The relationship is mph = km/h × 0.6213711922. Both units measure speed, so the conversion is a fixed factor that never changes.

## Common questions

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

One kilometer per hour equals 0.62137 miles per hour. mph = km/h × 0.6213711922.

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

Use mph = km/h × 0.6213711922. So 10 km/h is 6.213712 mph.

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

One mile per hour equals 1.609344 kilometers per hour, which is the reverse of the conversion above.

## Related pages

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