Miles per Hour to Knots Converter
1 mile per hour ≈ 0.868976242 knots
1 mile per hour equals 0.868976 knots
How to convert miles per hour to knots
Speed combines distance and elapsed time. Knots use the international nautical mile (1852 m), and mph uses the international statute mile (1609.344 m).
kn = mph × 0.8689762419One mile per hour is 0.8689762419 knots, so a single multiplication converts any value.
8.68976 kn ≈ 10 × 0.8689762419Miles per hour to knots conversion table
Common values in miles per hour, converted to knots.
| Miles per hour (mph) | Knots (kn) |
|---|---|
| 1 | 0.86897624 |
| 2 | 1.7379525 |
| 3 | 2.6069287 |
| 4 | 3.475905 |
| 5 | 4.3448812 |
| 10 | 8.6897624 |
| 20 | 17.379525 |
| 25 | 21.724406 |
| 50 | 43.448812 |
| 100 | 86.897624 |
| 250 | 217.24406 |
| 500 | 434.48812 |
| 1,000 | 868.97624 |
About these units
mile per hourmph
The standard road-speed unit in the United States and the United Kingdom.
knotkn
One nautical mile per hour: exactly 1.852 km/h. Used in marine and air navigation.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.