Converting from miles per hour to kilometres per hour? Use this accurate speed converter to help with any of your calculations, especially for mph to km/h.

Two of the most common units of speed are **kilometres per hour** and **miles per hour**. It can be very useful to understand the **km/h to mph conversion**, especially when travelling as both are a popular choice for measuring speed internationally. Their main purpose is in signalling speed limits in different countries and on speedometers in cars. Have a look at our other speed converters.

## How to use the Converter from mph to km/h?

Enter an amount of miles per hour in the box above and click “convert” for our** mph to km/h calculator** to give you an accurate new amount in kilometres per hour. The opposite conversion would be to convert kilometres per hour to miles per hour.

## Formula for Converting mph – km/h

When you need to **convert mph to kph** it can be useful to know the correct equation to help you do the calculation, and it is the same on used by our **miles per hour – kilometres per hour converter**. For instance, 24 mph = 38.62 km/h and 60 mph = 96.56 km/h

**[number of] miles per hour x 1.60934 = [number of] kilometres per hour**

## When to use mph?

The United States and United Kingdom choose to use the imperial unit of speed known as **miles per hour**, a unit that expresses the amount of miles travelled in an hour. **MPH** are included in car speedometers and road signs, and are chosen over kilometres, which is used in many other countries. Other abbreviations of the unit include MPH or mi/h. Try out the** mph to km/h calculator**.

## When to use km/h?

**Kilometres per hour** is the most common unit of speed that is used worldwide, found on road signs and in car speedometers. In American English, this unit of speed is spelt as kilometers per hour instead. It has several different abbreviations such as km/h (the official one), kph, kmph and km/hr. Use our **mph to kph speed converter** above.

### How much is 1 Mile per hour in Kilometres per hour?

**1.61 Kilometres per hour**

`(1mph = 1.61km/h)`

### How much are 2 Miles per hour in Kilometres per hour?

**3.22 Kilometres per hour**

`(2mph = 3.22km/h)`

### How much are 3 Miles per hour in Kilometres per hour?

**4.83 Kilometres per hour**

`(3mph = 4.83km/h)`

### How much are 4 Miles per hour in Kilometres per hour?

**6.44 Kilometres per hour**

`(4mph = 6.44km/h)`

### How much are 5 Miles per hour in Kilometres per hour?

**8.05 Kilometres per hour**

`(5mph = 8.05km/h)`

### How much are 10 Miles per hour in Kilometres per hour?

**16.09 Kilometres per hour**

`(10mph = 16.09km/h)`

### How much are 15 Miles per hour in Kilometres per hour?

**24.14 Kilometres per hour**

`(15mph = 24.14km/h)`

### How much are 20 Miles per hour in Kilometres per hour?

**32.19 Kilometres per hour**

`(20mph = 32.19km/h)`

### How much are 25 Miles per hour in Kilometres per hour?

**40.23 Kilometres per hour**

`(25mph = 40.23km/h)`

### How much are 30 Miles per hour in Kilometres per hour?

**48.28 Kilometres per hour**

`(30mph = 48.28km/h)`

### How much are 50 Miles per hour in Kilometres per hour?

**80.47 Kilometres per hour**

`(50mph = 80.47km/h)`

### How much are 100 Miles per hour in Kilometres per hour?

**160.93 Kilometres per hour**

`(100mph = 160.93km/h)`

### How much are 200 Miles per hour in Kilometres per hour?

**321.87 Kilometres per hour**

`(200mph = 321.87km/h)`

### How much are 500 Miles per hour in Kilometres per hour?

**804.67 Kilometres per hour**

`(500mph = 804.67km/h)`

### How much are 1000 Miles per hour in Kilometres per hour?

**1609.34 Kilometres per hour**

`(1000mph = 1609.34km/h)`