Miles per Hour to Knots Converter

One Miles per Hour equals 0.8689762427 Knots (1 mph = 0.8689762427 knot). Multiply a Miles per Hour value by 0.8689762427 to get the equivalent in Knots. Enter your value in the calculator above. The formula and examples below show how to calculate it by hand.

Formula

knot = mph × 0.8689762427

Multiply the Miles per Hour value by 0.8689762427 to get the equivalent value in Knots.

Example Conversions

1 Miles per Hour (mph)

0.8689762427 Knot (knot)

5 Miles per Hour (mph)

4.344881213 Knot (knot)

10 Miles per Hour (mph)

8.689762427 Knot (knot)

25 Miles per Hour (mph)

21.72440607 Knot (knot)

100 Miles per Hour (mph)

86.89762427 Knot (knot)

Conversion Table

Common conversion values from Miles per Hour to Knot
Miles per Hour (mph)Knot (knot)
0.10.08689762427
0.50.4344881213
10.8689762427
21.737952485
54.344881213
108.689762427
2521.72440607
5043.44881213
10086.89762427
250217.2440607
500434.4881213
1000868.9762427

How to Convert Manually

Use these steps to convert Miles per Hour values to Knot without the calculator.

  1. Write down the value in Miles per Hour (mph) that you want to convert.
  2. Multiply that value by 0.8689762427.
  3. For example, 10 Miles per Hour × 0.8689762427 = 8.689762427 Knots.
  4. Label the result as Knot (knot).

Relative Size Comparison

1 Miles per Hour
1 mph
1 Knot1.150779447 Miles per Hour
1 knot

This chart shows the visual difference in size between exactly one Miles per Hour and one Knot.

About Miles per Hour and Knot

The mile per hour is exactly 1.609344 kilometers per hour, the road speed unit of the US and UK. Tennis serves, baseball pitches, and hurricane winds are also quoted in mph. The knot is one nautical mile per hour, exactly 1.852 km/h. Ships, aircraft, and weather charts use knots because the nautical mile maps onto latitude minutes. One Miles per Hour equals 0.8689762427 Knots (1 mph = 0.8689762427 knot). Miles per Hour is used in US and UK speed limits and in ball sports speeds (pitches, serves). Knot is used in ship and boat speeds.

Precision and Rounding:Most speed factors are exact because they derive from exact length and time definitions (1 mph = 1.609344 km/h precisely); Mach is the exception, since the speed of sound varies with temperature and altitude. The figure used here is 343 m/s, the sea-level value at 20 °C. One decimal place covers driving and running; aviation and ballistics carry more.

Conversion factors per NIST Special Publication 811 and the BIPM SI Brochure (9th edition) (reference).

Worked Example

15Miles per Hour equals13.03464364Knots.

15 mph × 0.8689762427 = 13.03464364 knot

FAQ

How do I convert Miles per Hour to Knot?

Multiply the Miles per Hour value by 0.8689762427 to get the equivalent value in Knots.

What is the formula for Miles per Hour to Knot?

The formula is knot = mph × 0.8689762427.

How many Knots are in 1 Miles per Hour?

1 Miles per Hour equals 0.8689762427 Knots.

Can I convert Knot back to Miles per Hour?

Yes. 1 Knot equals 1.150779447 Miles per Hour, and the related converter can reverse the calculation.

What are common names for Miles per Hour and Knot?

Miles per Hour is shown as mph and may also be searched as mi/h, miles/hour. Knot is shown as knot and may also be searched as knots, kn.

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