Knots to miles per hour (kn to mph)
Convert knots to miles per hour. For speed, 1 kn equals 1.150779448 mph.
Converter
kn to mph conversion table
| Knots | Miles per hour |
|---|---|
| 1 kn | 1.1507794 mph |
| 2 kn | 2.3015589 mph |
| 5 kn | 5.7538972 mph |
| 10 kn | 11.507794 mph |
| 25 kn | 28.769486 mph |
| 50 kn | 57.538972 mph |
| 100 kn | 115.07794 mph |
| 1000 kn | 1150.7794 mph |
Formula
mph = kn × 1.150779448
Worked example
25 kn × 1.150779448 = 28.7694862 mph
Popular conversion examples
Choose an example to open this converter with the value filled in. These are useful examples, not a claim about search rankings.
- 1 kn to mph = 1.15078 mph
- 5 kn to mph = 5.7539 mph
- 100 kn to mph = 115.078 mph
- 516 kn to mph = 593.802 mph
- 160 mph to kn = 139.036 kn
- 1 mph to kn = 0.868976 kn
About knots and miles per hour
Knot (kn)
A knot is one nautical mile per hour, about 0.514444 meters per second. It is used for ship, aircraft and wind speeds.
Mile per hour (mph)
A mile per hour is exactly 0.44704 meters per second. It is used for road speed limits and vehicle speeds in the US and UK.
Both are units of speed; the base unit used internally is m/s.
Notes
- The knot is one international nautical mile per hour (1852/3600 m/s ≈ 0.514444 m/s).
- Negative values are accepted to represent velocity along a signed axis.
kn to mph FAQs
How do I convert knots to miles per hour?
Multiply the number of knots by 1.150779448 to get miles per hour. For example, 25 kn × 1.150779448 = 28.7695 mph.
How many miles per hour are in one knot?
1 kn = 1.150779448 mph and 1 mph = 0.8689762419 kn. To go the other way, use the miles per hour to knots converter.
How many miles per hour are in 40 knots?
40 kn = 46.0312 mph, rounded to 6 significant digits. Change the value in the converter above for any other amount.
How many miles per hour are in 72 knots?
72 kn = 82.8561 mph, rounded to 6 significant digits.
Is the kn to mph conversion exact?
The ratio is exact by definition, but its decimal form does not end (1.15077944802… to 12 significant digits). The converter keeps full precision internally and rounds only the displayed answer, which you can set from 4 to 12 significant digits.
What is the difference between knots and miles per hour?
A knot is one nautical mile per hour, about 0.514444 meters per second. It is used for ship, aircraft and wind speeds. A mile per hour is exactly 0.44704 meters per second. It is used for road speed limits and vehicle speeds in the US and UK.
What is a knot?
A knot is one nautical mile per hour: 1.852 km/h, or about 1.15078 mph.
Related converters
Reverse: Miles per hour to knots.
Browse all speed converters.
Guide
Read: Nautical Mile vs Mile, and What a Knot Is.