Looking to convert miles per hour to knots? This is the perfect online unit converter for you! An accurate conversion for mph to kn for speed calculations.

**Knots** and **miles per hour** are useful units of speed found to be a unit of measurement in different circumstances. Both are used to measure the speed of modes of transport, with kn being used for sea and air transport vehicles and mph being used for road transport mainly. View some of our other speed converters, such as the **miles per hour to knots** one above, when converting between different units.

## How to use the Converter for Mph to Knots?

In the **miles per hour – knots converter** above, enter the amount of miles per hour to be changed and click “convert” to be given a new amount in knots. The opposite conversion requires you to convert knots to miles per hour.

## Formula to Convert mph – kn

In mathematical, technical terms the formula used for this **miles per hour to knots conversion** is shown below should you need to know it or do the calculation by hand. For instance, 9 mph = 7.82 kn and 24 mph = 10.86 kn

**[number of] miles per hour / 1.15078 = [number of] knots**

## When to use mph?

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

## When to use knots?

**Knots** are an important unit of speed measurement used in meteorology but also in the air navigation and maritime industries. Its main purpose is to calculate the speed of vessels relative to the fluids in which they travel, whether that is water or air. One knot is equivalent to one nautical mile exactly. Above is our** mph to knots calculator**.

### How many is 1 Mile per hour in Knots?

**0.87 Knots**

`(1mph = 0.87kn)`

### How many are 2 Miles per hour in Knots?

**1.74 Knots**

`(2mph = 1.74kn)`

### How many are 3 Miles per hour in Knots?

**2.61 Knots**

`(3mph = 2.61kn)`

### How many are 4 Miles per hour in Knots?

**3.48 Knots**

`(4mph = 3.48kn)`

### How many are 5 Miles per hour in Knots?

**4.34 Knots**

`(5mph = 4.34kn)`

### How many are 10 Miles per hour in Knots?

**8.69 Knots**

`(10mph = 8.69kn)`

### How many are 15 Miles per hour in Knots?

**13.03 Knots**

`(15mph = 13.03kn)`

### How many are 20 Miles per hour in Knots?

**17.38 Knots**

`(20mph = 17.38kn)`

### How many are 25 Miles per hour in Knots?

**21.72 Knots**

`(25mph = 21.72kn)`

### How many are 30 Miles per hour in Knots?

**26.07 Knots**

`(30mph = 26.07kn)`

### How many are 50 Miles per hour in Knots?

**43.45 Knots**

`(50mph = 43.45kn)`

### How many are 100 Miles per hour in Knots?

**86.9 Knots**

`(100mph = 86.9kn)`

### How many are 200 Miles per hour in Knots?

**173.8 Knots**

`(200mph = 173.8kn)`

### How many are 500 Miles per hour in Knots?

**434.49 Knots**

`(500mph = 434.49kn)`

### How many are 1000 Miles per hour in Knots?

**868.98 Knots**

`(1000mph = 868.98kn)`