Knots to miles per hour
1 knot = 1.15 miles per hour
For any other value: mph = kn × 1.150779448
Calculator
34.52 mph
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You can leave the unit in: 100 kn is fine.
Knots to miles per hour chart
The values people look up most.
| knots | miles per hour |
|---|---|
| 30 kn | 34.52 mph |
| 40 kn | 46.03 mph |
| 20 kn | 23.02 mph |
| 50 kn | 57.54 mph |
| 35 kn | 40.28 mph |
| 15 kn | 17.26 mph |
| 10 kn | 11.51 mph |
| 100 kn | 115.08 mph |
| 25 kn | 28.77 mph |
| 120 kn | 138.09 mph |
| 21 kn | 24.17 mph |
| 60 kn | 69.05 mph |
| 17 kn | 19.56 mph |
| 150 kn | 172.62 mph |
| 22 kn | 25.32 mph |
| 18 kn | 20.71 mph |
| 140 kn | 161.11 mph |
| 300 kn | 345.23 mph |
| 8 kn | 9.21 mph |
| 130 kn | 149.6 mph |
| 45 kn | 51.79 mph |
| 200 kn | 230.16 mph |
| 400 kn | 460.31 mph |
| 12 kn | 13.81 mph |
| 16 kn | 18.41 mph |
| 160 kn | 184.12 mph |
| 500 kn | 575.39 mph |
| 5 kn | 5.75 mph |
| 55 kn | 63.29 mph |
| 6 kn | 6.9 mph |
Formula
mph = kn × 1.150779448
A knot is one nautical mile per hour, and a nautical mile is exactly 1,852 m — that is where the 1.15078 comes from.
Where this number comes from
This factor is exact, not rounded. A knot is one nautical mile — exactly 1,852 m — per hour.
Source: NIST Guide to the SI, Appendix B: Conversion Factors, NIST (National Institute of Standards and Technology, USA).
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