Convert Miles per hour to Knots
One mile per hour equals 0.868976 knots. Type any value to convert miles per hour to knots instantly — with a full reference table below.
Convert Miles per hour to Knots
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How to convert Miles per hour to Knots
To convert miles per hour to knots, multiply by 0.868976. One mile per hour equals 0.868976 kn, and one knot equals 1.150779 mph.
- Take the value in miles per hour — for example 7.5 mph.
- Multiply by 0.868976 (the number of knots in one mile per hour).
- 7.5 × 0.868976 = 6.517322 kn.
Quick mental estimate: Divide the number of miles per hour by 1.15 (within 0.1% of the exact answer).
Miles per hour to Knots conversion table
| Miles per hour | Knots |
|---|---|
| 1 mph | 0.868976 kn |
| 5 mph | 4.344881 kn |
| 10 mph | 8.689762 kn |
| 20 mph | 17.37952 kn |
| 25 mph | 21.72441 kn |
| 30 mph | 26.06929 kn |
| 40 mph | 34.75905 kn |
| 50 mph | 43.44881 kn |
| 60 mph | 52.13857 kn |
| 70 mph | 60.82834 kn |
| 80 mph | 69.5181 kn |
| 100 mph | 86.89762 kn |
| 120 mph | 104.2771 kn |
| Knots | Miles per hour |
|---|---|
| 1 kn | 1.150779 mph |
| 5 kn | 5.753897 mph |
| 10 kn | 11.50779 mph |
| 20 kn | 23.01559 mph |
| 25 kn | 28.76949 mph |
| 30 kn | 34.52338 mph |
| 40 kn | 46.03118 mph |
| 50 kn | 57.53897 mph |
| 60 kn | 69.04677 mph |
| 70 kn | 80.55456 mph |
| 80 kn | 92.06236 mph |
| 100 kn | 115.0779 mph |
| 120 kn | 138.0935 mph |
About converting Miles per hour to Knots
Miles per hour (mph) and Knots (kn) are both units of speed. The exact factor is 1 mph = 0.868976 kn, so multiply by 0.868976 to go from miles per hour to knots (or divide to go back).
The conversion runs entirely in your browser. Need the reverse? Use the Knots to Miles per hour converter, or the full unit converter for every unit at once.
Real-world speed in miles per hour and knots
| Example | Miles per hour | Knots |
|---|---|---|
| A walking pace | ≈ 3.131711 mph | ≈ 2.721382 kn |
| Usain Bolt's top speed (2009) | ≈ 27.78275 mph | ≈ 24.14255 kn |
| The UK motorway limit (70 mph) | 70 mph | 60.82834 kn |
| The German Autobahn advisory speed (130 km/h) | 80.77823 mph | 70.19436 kn |
| The speed of sound (air, 20 °C) | ≈ 767.2691 mph | ≈ 666.7387 kn |
| An airliner at cruise | ≈ 559.2341 mph | ≈ 485.9611 kn |
“≈” marks typical values; the rest are defined or measured figures.
The units
Miles per hour — exactly 0.44704 m/s.
Used for: Road speeds in the US and UK.
One nautical mile (1,852 m) per hour, about 0.5144 m/s.
Used for: Aviation, shipping and marine weather.
km/h, mph, ft/s and knots are all defined exactly in metres per second (a knot is one nautical mile, exactly 1,852 m, per hour).