Knots to mph
One kn equals 1.150779448 mph. Type any number and the answer appears as you type — the maths happens in your browser.
The same value in every unit
| Unit | Value |
|---|
- Free
- Files never leave your device
- No sign-up
Common values
| knots | mph |
|---|---|
| 1 kn | 1.1507794 mph |
| 2 kn | 2.3015589 mph |
| 3 kn | 3.4523383 mph |
| 5 kn | 5.7538972 mph |
| 10 kn | 11.507794 mph |
| 15 kn | 17.261692 mph |
| 20 kn | 23.015589 mph |
| 25 kn | 28.769486 mph |
| 50 kn | 57.538972 mph |
| 100 kn | 115.07794 mph |
| 500 kn | 575.38972 mph |
| 1000 kn | 1150.7794 mph |
How to use
- Enter the number of knots in the field.
- The result in mph updates on every keystroke.
- Use the table below for the values people look up most often.
Formula and reverse conversion
The formula
To convert by hand: mph = kn × 1.150779448. Going back the other way, one mph is 0.8689762419 kn.
Where the odd number comes from
The factor is not a round number because the imperial units are defined through the metric ones by international agreement: an inch is exactly 25.4 mm and a pound is exactly 0.45359237 kg. Everything else follows from those definitions.
mph = kn × 1.150779448
Frequently asked questions
How many mph are in one knots?
One kn is 1.150779448 mph.
How do I convert knots to mph?
Multiply by the factor: mph = kn × 1.150779448.
Is the result exact?
The factors are the exact legal definitions, and up to ten significant digits are kept in the answer. Rounding happens only in the display.
How do I convert mph back to knots?
One mph is 0.8689762419 kn — or open the reverse page linked below.