Knots to Miles per hour Converter
Type a value in knots to get it in miles per hour, and see the reverse conversion.
Your numbers
Your results
Converted value
Miles per hour (mph)
—
1 kn in mph
—
Your number read as mph, in kn
—
Kilometres per hour (km/h)
—
Metres per second (m/s)
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Knots to Miles per hour Converter by TheCalcTools
How the Knots to Miles per hour Converter works
A knot is one nautical mile per hour: exactly 1.852 km/h. Wind speeds at sea and aircraft speeds are given in knots.
To convert knots to miles per hour, multiply by 1.150779448. The calculator shows the result to 6 significant figures; the conversion factor itself is exact by definition.
Quick estimate in your head: add 15%.
The formula
mph = kn × 1.150779448kn = mph ÷ 1.150779448
Worked example
Using the default values shown in the calculator:
| Value in knots (kn) | 20 |
|---|
- 20 kn × 1.150779448 = 23.0156 mph.
Result:
| Miles per hour (mph) | 23.0156 |
|---|---|
| 1 kn in mph | 1.15078 |
| Your number read as mph, in kn | 17.3795 |
| Kilometres per hour (km/h) | 37.04 |
| Metres per second (m/s) | 10.2889 |
Conversion table
| kn | mph |
|---|---|
| 1 kn | 1.15078 mph |
| 5 kn | 5.7539 mph |
| 10 kn | 11.5078 mph |
| 15 kn | 17.2617 mph |
| 20 kn | 23.0156 mph |
| 25 kn | 28.7695 mph |
| 30 kn | 34.5234 mph |
| 40 kn | 46.0312 mph |
| 50 kn | 57.539 mph |
| 100 kn | 115.078 mph |
| 150 kn | 172.617 mph |
| 250 kn | 287.695 mph |
| 500 kn | 575.39 mph |
Frequently asked questions
What is 1 knot in miles per hour?
1 knot (kn) equals 1.15078 mph.
How fast is a 500-knot airliner?
About 575 mph or 926 km/h.
Sources and further reading
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This calculator gives estimates for information only. Check important results independently before you rely on them. See our disclaimer.