Miles per Hour to Knots Converter
Type a value in miles per hour to see it in knots. It works both ways: type in the knots box to convert back.
Formula
To convert miles per hour to knots, divide by 1.150779448 (the same as multiplying by 0.8689762419).
1 mph = 0.868976241901 kn and 1 kn = 1.15077944802 mph.
Miles per hour to knots table
| Miles per hour | Knots |
|---|---|
| 10 mph | 8.689762 kn |
| 20 mph | 17.37952 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 |
Worked examples
20 mph in knots
20 mph
17.37952 kn
20 × 0.8689762419 = 17.37952484
60 mph in knots
60 mph
52.13857 kn
60 × 0.8689762419 = 52.13857451
100 mph in knots
100 mph
86.89762 kn
100 × 0.8689762419 = 86.89762419
About Miles per Hour to Knots Converter
This converter turns miles per hour into knots as you type, and works the other way too: type in the knots box to convert back. To convert miles per hour to knots, divide by 1.150779448 (the same as multiplying by 0.8689762419). For example, 20 mph is 17.37952 kn, and 60 mph is 52.13857 kn.
Speed limits in the UK are in miles per hour, most other countries use kilometres per hour, and sailors and pilots use knots, so travellers and drivers convert speeds often. Both units have exact definitions, so the converter gives an exact result, rounded only for display. Use the table below for common values, or set the decimal places to round the answer for a form or a label.
How to use Miles per Hour to Knots Converter
- Type the amount in miles per hour in the first box.
- Read the answer in knots in the second box and in the result line below.
- To convert the other way, type in the knots box instead, or use the swap button to open the knots to miles per hour page.
- Choose a number of decimal places if you need a rounded figure, then copy the result line.
Common uses
- Reading a wind speed forecast
- Comparing running, cycling or boat speeds
- Physics and engineering homework
- Driving abroad or in a hire car with a different speedometer
Frequently asked questions
How many knots are in one mile per hour?
There are 0.8689762419 knots in one mile per hour. This figure is exact, because both units have fixed definitions.
How do I convert miles per hour to knots?
To convert miles per hour to knots, divide by 1.150779448 (the same as multiplying by 0.8689762419). For example, 100 mph is 86.89762 kn.
How do I convert knots to miles per hour?
Going the other way, multiply by 1.150779448. The knots to miles per hour converter does this for you.
What is 70 mph in knots?
70 mph is 60.82834 kn.
Why do ships and aircraft use knots?
A knot is one nautical mile per hour, and a nautical mile matches one minute of latitude. That makes distances on charts easy to work out, so knots became the standard at sea and in the air.