mph to knots – convert miles per hour to knots
Convert mph to knots (miles per hour to nautical miles per hour) for boats, ships, aircraft and wind speeds. This page opens the main speed converter with mph → knots pre-selected.
Open the interactive mph → knots converter:
Use main converter (mph → knots) or switch to knots → mphYou can also convert via km/h and m/s on the homepage. The Tool Hub timers help with navigation exercises and flight planning.
Quick reference: mph to knots
The approximate factor is 1 mph ≈ 0.868976 knots, so: knots = mph × 0.868976.
| mph | Knots (approx.) |
|---|---|
| 10 mph | 8.69 kn |
| 20 mph | 17.38 kn |
| 30 mph | 26.07 kn |
| 40 mph | 34.76 kn |
| 50 mph | 43.45 kn |
| 60 mph | 52.14 kn |
How to convert miles per hour to knots
Use:
knots = mph × 0.868976
Examples:
- 25 mph × 0.868976 ≈ 21.7 kn
- 35 mph × 0.868976 ≈ 30.4 kn
- 80 mph × 0.868976 ≈ 69.5 kn
Why convert mph to knots?
- Interpreting aviation or marine forecasts given in knots.
- Translating car-style speeds into nautical contexts.
- Comparing wind speeds across different reporting standards.
- Studying navigation or meteorology using a single common unit.
More speed converters on this site
The converter internally uses metres per second as the base speed unit to keep all pairs consistent.