Convert Knots to Miles per hour
One knot equals 1.150779 miles per hour. Type any value to convert knots to miles per hour instantly — with a full reference table below.
Convert Knots to Miles per hour
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How to convert Knots to Miles per hour
To convert knots to miles per hour, multiply by 1.150779. One knot equals 1.150779 mph, and one mile per hour equals 0.868976 kn.
- Take the value in knots — for example 7.5 kn.
- Multiply by 1.150779 (the number of miles per hour in one knot).
- 7.5 × 1.150779 = 8.630846 mph.
Quick mental estimate: Multiply the number of knots by 1.15 (within 0.1% of the exact answer).
Knots to Miles per hour conversion table
| 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 |
| 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 |
About converting Knots to Miles per hour
Knots (kn) and Miles per hour (mph) are both units of speed. The exact factor is 1 kn = 1.150779 mph, so multiply by 1.150779 to go from knots to miles per hour (or divide to go back).
The conversion runs entirely in your browser. Need the reverse? Use the Miles per hour to Knots converter, or the full unit converter for every unit at once.
Real-world speed in knots and miles per hour
| Example | Knots | Miles per hour |
|---|---|---|
| A walking pace | ≈ 2.721382 kn | ≈ 3.131711 mph |
| Usain Bolt's top speed (2009) | ≈ 24.14255 kn | ≈ 27.78275 mph |
| The UK motorway limit (70 mph) | 60.82834 kn | 70 mph |
| The German Autobahn advisory speed (130 km/h) | 70.19436 kn | 80.77823 mph |
| The speed of sound (air, 20 °C) | ≈ 666.7387 kn | ≈ 767.2691 mph |
| An airliner at cruise | ≈ 485.9611 kn | ≈ 559.2341 mph |
“≈” marks typical values; the rest are defined or measured figures.
The units
One nautical mile (1,852 m) per hour, about 0.5144 m/s.
Used for: Aviation, shipping and marine weather.
Miles per hour — exactly 0.44704 m/s.
Used for: Road speeds in the US and UK.
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).