How to Convert Knots to MPH

by Henry J. Collins
A knot customarily expresses speed at sea.

A knot customarily expresses speed at sea.

A knot is a unit of velocity typically used for boats and aircraft. Miles per hour, on the other hand, measures the speed of cars in the United States. One knot equals a speed of 1 nautical mile per hour, or 6,076 feet per hour. One mile per hour equals 5,280 feet per hour. So the speed of 1 knot is slightly faster than 1 mile per hour. Converting knots to miles per hour is done by using a mathematical formula.

1. Look at your gauges in your boat or aircraft to determine your speed in knots.

2. Multiply knots by 1.151 to convert to miles per hour. For example, 20 knots multiplied by 1.151 equals 23 miles per hour.

3. Multiply miles per hour by 0.869 to convert miles per hour to knots. For example, 30 miles per hour multiplied by 0.869 equals 26 knots.

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About the Author

Henry J. Collins has been writing and editing for more than 25 years. He began at a weekly newspaper and completed a 16-year career with a daily newspaper, where he left as the managing editor. Collins has covered everything from Little League baseball to the Super Bowl, as well as local and national politics.

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