Miles per hour to knots
Multiply miles per hour by 0.868976 to get knots.
30 mph = 26.0693 kn
How to convert miles per hour to knots
The knot is one nautical mile (exactly 1852 m) per hour, used in aviation and at sea. The mile per hour is miles travelled per hour, exactly 1.609344 km/h.
Worked example — 30 mph: 30 × 0.868976 = 26.0693 kn.
Miles per hour to knots table
| Miles per hour | Knots |
|---|---|
| 1 mph | 0.868976 kn |
| 5 mph | 4.3449 kn |
| 10 mph | 8.6898 kn |
| 20 mph | 17.3795 kn |
| 30 mph | 26.0693 kn |
| 50 mph | 43.4488 kn |
| 60 mph | 52.1386 kn |
| 100 mph | 86.8976 kn |
| 150 mph | 130.3464 kn |
Reverse and related
About miles per hour and knots
Mile per hour (mph)
1 mph = 0.868976 knDefinition. Miles travelled per hour, exactly 1.609344 km/h
History and origin
Miles per hour grew out of the English mile and the hour as roads and railways spread in the nineteenth century. It equals exactly 1.609344 kilometres per hour.
Current use
Miles per hour is the speed unit for road traffic in the United States and United Kingdom, and is common for running pace.
Source: NIST Handbook 44, Appendix C (Tables of Equivalents — international nautical mile); speeds derived from the exact mile, foot and hour
Knot (kn)
1 kn = 1.1508 mphDefinition. One nautical mile (exactly 1852 m) per hour, used in aviation and at sea
History and origin
The knot dates from sailing ships, where speed was measured by counting knots on a line let out over a set time. One knot is one nautical mile, exactly 1852 metres, per hour.
Current use
Knots are the standard speed unit in aviation and at sea, and are widely used for wind speed.
Source: NIST Handbook 44, Appendix C (Tables of Equivalents — international nautical mile); speeds derived from the exact mile, foot and hour
Where people use this
Miles per hour: vehicle speed in the US and UK, speed limits, running pace. Knots: aviation, sailing and shipping, wind speed. A 60 mph wind is about 52 knots.
Every value is carried to full double precision; the display is rounded.
Both units are defined in NIST Handbook 44, Appendix C (Tables of Equivalents — international nautical mile); speeds derived from the exact mile, foot and hour.
Questions people ask
How many knots is 60 mph?
60 mph is about 52 knots.
How many knots in a mph?
One mile per hour is about 0.869 knots.
How many knots is 100 mph?
100 mph is about 86.9 knots.