MPH to Knots Converter
Quick answer: To convert MPH to knots, multiply by 0.8689762. For example, 10 mph is 8.689762 kn. One mile per hour equals 0.8689762 kn.
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Use the MPH to Knots Converter
MPH to Knots formula and what each symbol means
kn = mph × 0.8689762
| Symbol | Meaning |
|---|---|
| mph | Mile per hour |
| kn | Knot |
MPH to Knots examples
1 mph
1 mph × 0.8689762 = 0.8689762 kn.
10 mph
10 mph × 0.8689762 = 8.689762 kn.
100 mph
100 mph × 0.8689762 = 86.89762 kn.
MPH compared with Knots
One kn is 1.151 times as large as one mph, so your number gets smaller when you convert MPH to knots and bigger when you convert back. If the answer is not smaller than what you typed, you multiplied instead of dividing.
About MPH and knots
Mile per hour (mph): Miles per hour, exactly 0.44704 m/s. Knot (kn): Nautical miles per hour, exactly 1852/3600 m/s.
Where MPH to knots conversions are used
Wind and weather reports mix m/s, km/h, mph and knots. Road signs use km/h or mph depending on the country, and aviation and shipping use knots.
How to calculate MPH to Knots step by step
- Enter the value in mph (the starting unit).
- Multiply by 0.8689762, because 1 mph = 0.8689762 kn.
- The product is the value in kn. To go back, divide by 0.8689762 or multiply by 1.150779.
Popular speed conversions
How to read your MPH to Knots result
Quick estimate: multiply by about 0.87 to get knots from MPH; this is within 0.2% of the exact factor. To go from km/h to m/s divide by 3.6.
| MPH | KNOTS |
|---|---|
| 1 | 0.8689762 |
| 2 | 1.737952 |
| 5 | 4.344881 |
| 10 | 8.689762 |
| 20 | 17.37952 |
| 50 | 43.44881 |
| 100 | 86.89762 |
| 1,000 | 868.9762 |
Knots to MPH: quick table
| KNOTS | MPH |
|---|---|
| 1 | 1.150779 |
| 5 | 5.753897 |
| 10 | 11.50779 |
| 25 | 28.76949 |
| 50 | 57.53897 |
| 100 | 115.0779 |
| 250 | 287.6949 |
| 500 | 575.3897 |
Common mistakes when calculating MPH to Knots
- Forgetting to divide by 3.6 for km/h to m/s.
- Dividing when you should multiply: from mph to kn multiply by 0.8689762; from kn to mph divide by 0.8689762.
MPH to Knots FAQ
How many kn are in 1 mph?
1 mph equals 0.8689762 kn.
How many mph are in 1 kn?
1 kn equals 1.150779 mph.
Is 1 mph = 0.8689762 kn an exact conversion?
Yes. The mile per hour and the knot are both defined exactly in SI terms, so the ratio has no measurement uncertainty; 0.8689762 is just that ratio shown to 7 significant figures.
What is a knot (kn)?
Nautical miles per hour, exactly 1852/3600 m/s.
How can I estimate MPH to knots in my head?
Quick estimate: multiply by about 0.87 to get knots from MPH; this is within 0.2% of the exact factor.
What is 60 mph in knots?
60 mph = 52.13857 kn (since 60 × 0.8689762).
What is 250 mph in knots?
250 mph = 217.2441 kn (since 250 × 0.8689762).
What is 7 mph in knots?
7 mph = 6.082834 kn (since 7 × 0.8689762).
How many decimals should I keep when converting mph to kn?
Match the precision of your original measurement. For example, 8.689762 kn rounds to 8.69 kn at 3 significant figures; keep more digits only for engineering or scientific work.
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Method, review and disclaimer
Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST SP 811, Appendix B.8: conversion factors