Miles per Hour to Knots
( mph → kn )
Instantly convert miles per hour to knots. Enter any value below and get an accurate result with the full formula and reference table.
How to Convert Miles per Hour to Knots
To convert miles per hour to knots, divide the number of miles per hour by 1.15077945. This is because 1 knot is defined as 1 nautical mile per hour, and 1 nautical mile = 1.852 kilometers, while 1 mile = 1.609344 kilometers.
Step-by-Step Example
Let’s convert 100 miles per hour to knots:
1. Divide by 1.15077945: 100 ÷ 1.15077945 ≈ 86.8976
2. So 100 mph equals approximately 86.9 knots.
For a smaller amount, 50 mph ÷ 1.15077945 = 43.4488 knots.
When You’d Use Each Unit
Miles per hour are the standard unit for speed limits and vehicle speeds in the United States, the United Kingdom, and a few other countries. Knots are the standard unit for speed in aviation, maritime navigation, and meteorology. Converting between them is essential for understanding speed in different contexts, such as comparing wind speeds, ship speeds, or aircraft performance.
Common miles per hour values converted to knots — typical values highlighted.
| mph | knots | Approximate |
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