To convert mph to knots, multiply by 0.8689762419.
The calculation uses 1 mph = 0.8689762419 kn. Results are displayed to at most 10 significant digits. Definitions can be exact while a displayed decimal is rounded. Match the displayed precision to your original measurement.
The formula
value in kn = value in mph × 0.8689762419
mph- Input unit: mph
kn- Output unit: knots
How to use this calculator
- Enter a value in mph.
- Multiply by the stored conversion factor.
- Read the result in kn; divide by the same factor to convert back.
Worked examples
Worked conversion
1 mph × 0.8689762419 ≈ 0.8689762419 kn.
Reverse conversion
0.8689762419 kn ÷ 0.8689762419 ≈ 1 mph. Rounding intermediate values can change the last displayed digit.
Frequently asked questions
What factor does this converter use?
It uses 0.8689762419 kn per mph.
Why can another converter show a slightly different answer?
Check the unit convention first (such as US versus Imperial or decimal versus binary), then compare rounding. Measurement uncertainty is separate from the unit conversion.
mph to kn table
| mph | kn (rounded) |
|---|---|
| 0 | 0 |
| 1 | 0.8689762419 |
| 2 | 1.737952484 |
| 5 | 4.34488121 |
| 10 | 8.689762419 |
| 100 | 86.89762419 |
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