Miles per Hour to Knots
Convert miles per hour to knots instantly. 1 mph = 0.8689762419 kn. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert miles per hour to knots
To convert miles per hour to knots, divide by 1.150779448 (multiply by 0.8689762419). The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
kn = mph × 0.8689762419
Miles per Hour to Knots conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Miles per Hour | Knots |
|---|---|
| 1 mph | 0.868976 kn |
| 2 mph | 1.737952 kn |
| 3 mph | 2.606929 kn |
| 5 mph | 4.344881 kn |
| 10 mph | 8.689762 kn |
| 20 mph | 17.379525 kn |
| 25 mph | 21.724406 kn |
| 50 mph | 43.448812 kn |
| 100 mph | 86.897624 kn |
| 500 mph | 434.488121 kn |
| 1,000 mph | 868.976242 kn |
What is a miles per hour?
Exactly 0.44704 m/s. Road speeds in the US and UK.
What is a knot?
One nautical mile per hour, the standard at sea and in the air.
The formula
kn = mph × 0.8689762419
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Miles per Hour to Knots
- Type the number of miles per hour you want to convert.
- Read the result in knots straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked knots to miles per hour page.
Miles per Hour to Knots — frequently asked questions
How many knots are in a miles per hour?
One miles per hour equals 0.8689762419 kn. kn = mph × 0.8689762419
What is the formula to convert miles per hour to knots?
The formula is kn = mph × 0.8689762419. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert knots back to miles per hour?
Divide instead of multiplying: one knot is 1.150779448 mph. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this miles per hour to knots free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the miles per hour to knots.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 19, 2026 · Calculation runs client-side · No data collected · Report an error