# Convert miles per hour to knots

Enter the number of miles per hour you want to convert to knots in the text box below. The conversion to speed in knots will update as you type.

{"answerString":"0.869","answerSymbol":"knots"}## Precise decimal and fraction answers

The conversion in knots rounded to six significant decimal places is **1 mph = 0.868976 kn.**
The precise fraction answer is ** ^{577}/_{664} kn**.

### Decimal Precision

Conversion from one to ten decimal places

- 1 mph =
**0.9 kn** - 1 mph =
**0.87 kn** - 1 mph =
**0.869 kn** - 1 mph =
**0.8690 kn** - 1 mph =
**0.86898 kn** - 1 mph =
**0.868976 kn** - 1 mph =
**0.8689762 kn** - 1 mph =
**0.86897624 kn** - 1 mph =
**0.868976242 kn** - 1 mph =
**0.8689762419 kn**

## How many knots is a mile per hour?

A mile per hour is slower than a knot. **
0.869 knots is the same velocity as one mile per hour**. A mile per hour is **86.90% the velocity a knot**. An object moving at a knot is 15.08% faster than an object traveling at one mile per hour.

## Miles per hour to knots conversion factor and formulas

FormulaThe conversion factor between miles per hour and knots is 1.151. This represents the ratio of miles per hour per one knot. To calculate the value in knots, we can either divide by the conversion factor or multiply by its inverse.

### Division

To convert from miles per hour to knots, divide miles per hour by 1.151.

The formula is expressed as:

*mph ÷ 1.151 = kn*

### Multiplication

Alternatively we can multiply by the inverse conversion factor to get the same result.

The inverse of 1.151 is 1/1.151 or 0.869.
To convert from miles per hour to knots, multiply miles per hour by 0.869.

The formula is expressed as:

*mph × 0.869 = kn*

## About this conversion

When converting from from miles per hour to knots, both units are within the US Customary / UK Imperial system and conversion factors are governed by standards set by the controlling body.

## About Miles per hour

Customary/Imperial UnitMiles per hour is a velocity measurement within the US/UK Imperial systems. It is defined as the number of miles traveled in one hour. MPH is frequently used for measurement and regulation of vehicle speed limits in the US, UK and many British dependencies. The common symbols for miles per hour are mph, MPH or mi/hr.

## About Knots

Customary/Imperial UnitKnots are a measure of speed over long geographic distances most often associated with the maritime and aviation communities. A knot is a measurement of distance traveled in nautical miles in one hour. The origins of the knot derive from practice of mariners throwing a wooden chip log attached to a line off the stern of a ship. As the ship traveled forward, the line spooled out and the number of physical knots on the line where counted over a 30 second period to determine boat speed. The symbol for knots is either kn or kt.

## Reverse this conversion

Convert from knots to miles per hour instead.

## 1 miles per hour to other speed units

### Metric

- 1 mph =
**1.609 km/h**

### Imperial/U.S.

- 1 mph =
**1 mph** - 1 mph =
**0.869 kn**

## References and Citations

- National Institute of Standards and Technology (NIST) General Tables of Units of Measurement

## Miles per hour to knots conversion table

mph | kn |
---|---|

1 mph | 0.869 kn |

2 mph | 1.738 kn |

3 mph | 2.607 kn |

4 mph | 3.476 kn |

5 mph | 4.345 kn |

6 mph | 5.214 kn |

7 mph | 6.083 kn |

8 mph | 6.952 kn |

9 mph | 7.821 kn |

10 mph | 8.69 kn |

mph | kn |
---|---|

20 mph | 17.38 kn |

30 mph | 26.069 kn |

40 mph | 34.759 kn |

50 mph | 43.449 kn |

60 mph | 52.139 kn |

70 mph | 60.828 kn |

80 mph | 69.518 kn |

90 mph | 78.208 kn |

100 mph | 86.898 kn |

1,000 mph | 868.976 kn |

**Disclaimer:**Calculations on this site are believed to be accurate by

**answercalc.com**, however we provide no guarantee as such. Values my be rounded or computational or data inaccuracies could exist. This site accepts no responsibility for errors that may be present. Always double check calculations when relying on data for critical applications.