Knots to Miles Per Hour
A knot is one nautical mile per hour, about 1.15 mph, the standard speed unit in marine and air navigation. Miles per hour is the standard speed unit on road signs and speedometers in the US and UK. 1 kn equals ≈1.15078 mph, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to speed, measured here against speed's base unit (m/s) — every other speed unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
mph = kn × ≈1.15078
kn = mph × ≈0.868976
Worked example: 5 kn × ≈1.15078 = ≈5.7539 mph.
Conversion table
| Knot (kn) | Mile per hour (mph) |
|---|---|
| 1 kn | ≈1.15078 mph |
| 2 kn | ≈2.30156 mph |
| 3 kn | ≈3.45234 mph |
| 5 kn | ≈5.7539 mph |
| 10 kn | ≈11.5078 mph |
| 20 kn | ≈23.0156 mph |
| 25 kn | ≈28.7695 mph |
| 50 kn | ≈57.539 mph |
| 100 kn | ≈115.078 mph |
| 250 kn | ≈287.695 mph |
| 500 kn | ≈575.39 mph |
| 1,000 kn | ≈1,150.78 mph |
Frequently asked
- How many Miles per hour in a knot?
- 1 kn equals ≈1.15078 mph.
- How do I convert Knots to Miles per hour?
- Multiply the value in kn by ≈1.15078 to get mph. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Knot and Mile per hour are both defined by a fixed conversion factor to speed's base unit (m/s), so the result shown is exact to the precision displayed, not an approximation.