Miles per Hour to Knots Converter
Enter the speed in miles per hour below to convert it to knots.
Convert Miles per Hour to Knots
Enter a value in miles per hour (mph) to convert to knots (kn).
Miles per Hour to Knot Conversion Table
Table showing various miles per hour measurements converted to knots. Click any preset value or arrow to load it into the converter.
| Miles per Hour (mph) | Knots (kn) |
|---|---|
| 1 mph | 0.8689762 kn |
| 2 mph | 1.7379525 kn |
| 5 mph | 4.3448812 kn |
| 10 mph | 8.6897624 kn |
| 15 mph | 13.0346436 kn |
| 20 mph | 17.3795248 kn |
| 25 mph | 21.724406 kn |
| 30 mph | 26.0692873 kn |
| 50 mph | 43.4488121 kn |
| 75 mph | 65.1732181 kn |
How to Convert Miles per Hour to Knots
To convert miles per hour to knots, multiply the speed by the following conversion ratio: 0.8689762 knots/miles per hour.
Since one miles per hour is equal to 0.8689762 knots, you can use this simple formula to convert:
The speed in knots is equal to the speed in miles per hour multiplied by 0.8689762.
For example, here's how to convert 50 miles per hour to knots using the formula above.
How Many Knots Are in a Miles per Hour?
There are 0.8689762 knots in a miles per hour, which is why we use this value in the formula above.
Our miles per hour to knot calculator automatically converts your speed measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Miles per Hour and knots are both units used to measure speed. Keep reading to learn more about each unit.
What Is a Miles per Hour?
A miles per hour is a unit of speed equal to 0.44704 meters per second (m/s), the base unit for speed. Imperial & US road speed unit (1 mph = 1.609344 km/h). [1]
The miles per hour is classified as a US customary and imperial unit of speed. Miles per Hour can be abbreviated as mph; for example, 1 miles per hour can be written as 1 mph.
When working with miles per hour (mph) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, miles per hour (mph) are widely used across standard speed applications within US customary and imperial workflows, engineering documentation, and technical data sheets.
What Is a Knot?
A knot is a unit of speed equal to 0.5144444 meters per second (m/s), the base unit for speed. One nautical mile per hour (1.852 km/h = 0.514444 m/s). [2]
The knot is classified as a standard unit of speed. Knots can be abbreviated as kn; for example, 1 knot can be written as 1 kn.
When working with knots (kn) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, knots (kn) are widely used across standard speed applications within international standard workflows, engineering documentation, and technical data sheets.
When converting speed between miles per hour (mph) and knots (kn), keep full floating-point precision (1 mph = 0.8689762 kn; 1 kn = 1.1507794 mph) during intermediate calculations and round only the final knot figure to match your instrument tolerance.
More Miles per Hour & Knot Conversions
Need to calculate in the opposite direction? Use our knots to miles per hour converter (kn to mph) to switch your starting unit immediately. You can also explore related tools such as converting miles per hour to kilometers per hour, converting miles per hour to meters per second, or converting kilometers per hour to miles per hour.
Convert from Miles per Hour
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Velocity))·Speed Metrology Standard — Miles per Hour (mph) to Knots (kn)
- [2]NIST OWM SpecificationNIST OWM (SI Units — Length & Distance)·Unit Specifications: Miles per Hour (mph) & Knot (kn)
- [3]NIST CUU ReferenceNIST CUU (SI Coherent Derived Units (m/s))·Conversion Factors & Mathematical Basis (mph to kn)