For a speed already in knots, open knots to kph to obtain km/h directly. For another source unit or the reverse direction, open the speed converter.
A knot is one nautical mile per hour. The nautical mile is 1852 meters, so 1 knot = 1.852 km/h. Here both tools convert speed; a miles-to-kilometers distance conversion answers a separate question.
Focused form or unit menu?
| Knots to kph | Speed converter | |
|---|---|---|
| Inputs | One nonnegative speed in knots | A value, source unit and target unit |
| Unit choices | Knots to km/h | km/h, mph, m/s and knots in any pair |
| Default | 20 knots | 100 km/h to mph |
| Primary display | Up to 3 decimal places | Exactly 2 decimal places |
| Default result | 37.04 km/h | 62.14 mph |
| Details | Entered knots, m/s, mph, conversion factor | All four supported speeds |
The focused form multiplies knots by 1.852. For 15 knots, 15 × 1.852 = 27.78 km/h. Its m/s reference divides that result by 3.6; its mph reference divides by 1.609344.
The hub converts through km/h and then divides by the target factor. Select knots as its source and km/h as its target to obtain 27.78 km/h for 15 knots. Unlike the focused nonnegative form, the hub permits signed finite inputs.
Choose the next task
Use the focused form when knots is already the source and km/h is the requested destination. Use the hub to reverse km/h to knots or compare the same speed with mph and m/s. For a stated distance rather than a per-time rate, use a distance converter; for minutes per distance, use a pace converter.
Limits
Keep the time unit attached. A nautical mile is not a statute mile, and knots are not mph. The factors define the units; display rounding does not add measurement accuracy. Neither conversion makes a navigation, weather or equipment decision.
Sources
NIST SP 811, unit definitions and Appendix B factors. The paired calculator controls and rounding described above are their current form behavior.