Miles per Hour to Knot Converter
One Miles per Hour equals 0.8689762427 Knot (1 mph = 0.8689762427 knot). Multiply a Miles per Hour value by 0.8689762427 to get the equivalent in Knot. Use the calculator above for instant results, or follow the formula, worked examples, and reference table below.
Formula
knot = mph × 0.8689762427
Multiply the Miles per Hour value by 0.8689762427 to get the equivalent value in Knot.
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
| Miles per Hour (mph) | Knot (knot) |
|---|---|
| 0.1 | 0.08689762427 |
| 0.5 | 0.4344881213 |
| 1 | 0.8689762427 |
| 2 | 1.737952485 |
| 5 | 4.344881213 |
| 10 | 8.689762427 |
| 25 | 21.72440607 |
| 50 | 43.44881213 |
| 100 | 86.89762427 |
| 250 | 217.2440607 |
| 500 | 434.4881213 |
| 1000 | 868.9762427 |
How to Convert Manually
Use these steps to convert Miles per Hour values to Knot without the calculator.
- Write down the value in Miles per Hour (mph) that you want to convert.
- Multiply that value by 0.8689762427.
- For example, 10 Miles per Hour × 0.8689762427 = 8.689762427 Knot.
- Label the result as Knot (knot).
Relative Size Comparison
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 Knot (1 mph = 0.8689762427 knot). Miles per Hour to Knot conversion comes up most often in US and UK speed limits and in ball sports speeds (pitches, serves), typically when figures need restating for 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
15 Miles per Hour equals 13.03464364 Knot.
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 Knot.
What is the formula for Miles per Hour to Knot?
The formula is knot = mph × 0.8689762427.
How many Knot are in 1 Miles per Hour?
1 Miles per Hour equals 0.8689762427 Knot.
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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