MPH to Knots Converter
Convert miles per hour to knot instantly. 1 mph = 0.8689762419 kn, worked steps and a full reference table.
How to use it
- Type the value in miles per hour — the result updates as you type.
- Use Swap to flip the direction, or change either dropdown to convert between any two units.
- Click the result to copy it. The URL updates too, so you can bookmark or share the exact conversion.
Examples
| 1 mph | 0.8689762419 kn |
| 5 mph | 4.34488121 kn |
| 10 mph | 8.689762419 kn |
| 100 mph | 86.89762419 kn |
One miles per hour equals 0.86897624 knots (kn). To convert miles per hours to knots, multiply by 0.86897624; to go back the other way, multiply by 1.1507794 instead.
The converter above does it as you type and shows the working underneath, so you can check the arithmetic rather than take the number on trust.
What miles per hours and knots actually measure
Miles per hour (mph) — Miles per hour. Road speeds in the US and UK.
Knot (kn) — A knot is one nautical mile per hour — 1.852 km/h. Marine and aviation speed, and wind speed in forecasts.
MPH to Knots conversion table
The most common values, worked out in advance. Anything not listed can be typed straight into the converter.
| mph | kn |
|---|---|
| 1 mph | 0.86897624 kn |
| 2 mph | 1.7379525 kn |
| 5 mph | 4.3448812 kn |
| 10 mph | 8.6897624 kn |
| 25 mph | 21.724406 kn |
| 50 mph | 43.448812 kn |
| 100 mph | 86.897624 kn |
How to convert miles per hours to knots by hand
Multiply the number of miles per hours by 0.86897624.
For example, 25 mph × 0.86897624 = 21.724406 kn.
Going the other way, divide by 0.86897624 — or multiply by 1.1507794, which is the same thing and easier to do in your head.
Everything runs in your browser
There is no server involved in the calculation. The numbers you type never leave your device, nothing is logged, and the page keeps working with no connection once it has loaded. That is not a marketing line — it is simply how the tool is built, because a calculation like this has no reason to touch a network.
Questions people ask
How many kn are in 1 mph?
1 mph equals exactly 0.8689762419 kn. Multiply any value in miles per hour by 0.8689762419 to get knot.
Is anything uploaded to a server?
No. The whole calculation happens in your browser. Nothing is sent anywhere, and the page keeps working offline once loaded.
Last updated 18 August 2026