Unit converter
Knots to Kilometers Per Hour Converter
Convert knots to kilometres per hour when nautical speeds need a metric land-speed reading. The exact factor here is 1.852, so 1 knot is 1.852 km/h. Knots are common in shipping, sailing, aviation, and weather reporting, while kilometres per hour are familiar on road signs and many consumer fitness devices. The value follows the unit table: one knot is 0.5144444444444445 metres per second, and one kilometre per hour is 0.2777777777777778 metres per second, so the quotient is 1.852.
1 knot = 1.852 kilometers per hour
Common knots to kilometers per hour values
| Knots | Kilometers per hour |
|---|---|
| 1 kn | 1.852 km/h |
| 2 kn | 3.704 km/h |
| 5 kn | 9.26 km/h |
| 10 kn | 18.52 km/h |
| 20 kn | 37.04 km/h |
| 50 kn | 92.6 km/h |
| 100 kn | 185.2 km/h |
How to convert
- Begin with the speed in knots.
- Multiply the knot value by 1.852 to convert it into kilometres per hour.
- The factor is found by dividing 0.5144444444444445 m/s by 0.2777777777777778 m/s.
- To go from km/h back to knots, divide by 1.852.
- For a mental estimate, double the knots and subtract about 7.5 percent: 12 kn is near 22 km/h, and 30 kn is near 56 km/h.
km/h = knots * 1.852
Both speed units are compared through metres per second. The knot base value is 0.5144444444444445, and the kilometre-per-hour base value is 0.2777777777777778. Dividing 0.5144444444444445 by 0.2777777777777778 gives 1.852, so the knot value is multiplied by 1.852.
- knots
- the nautical speed being converted
- 1.852
- km/h represented by a single knot
Worked example
A ferry travelling at 18 kn is 18 multiplied by 1.852, which equals 33.336 km/h. A 35 kn aircraft taxi or low-speed marine figure would convert to 64.82 km/h, which makes the pace easier to compare with road movement.
Key facts
- 1 knot is 1.852 km/h.
- 10 knots is 18.52 km/h.
- 25 knots is 46.3 km/h.
- 60 knots is 111.12 km/h.
Tips
- Double the knot figure for a quick upper estimate, then reduce it slightly for a closer number.
- Use one decimal place for weather and boating notes unless an operating manual asks for more precision.
- For charts, tides, and aviation material, keep the original knot figure alongside the converted km/h value.
Frequently asked questions
How many km/h are in 1 knot?+
There are exactly 1.852 kilometres per hour in 1 knot using the factors in this calculator.
Why is the knot to km/h factor a clean 1.852?+
A nautical mile is 1852 metres, and an hour is shared by both speed units. That relationship gives 1.852 kilometres per hour for each knot.
Is 50 knots very fast in km/h?+
50 knots is 92.6 km/h. On water that is fast for many craft, while in aviation it may describe lower-speed phases rather than cruise flight.
Can I use this for wind speeds?+
Yes. Wind speeds in knots can be multiplied by 1.852 to get km/h, though official forecasts should still be read in their published units when making safety choices.
Things to watch
- A knot is one nautical mile per hour, not one kilometre per hour.
- Boat speed through water and speed over ground can differ when current is present.
Sources
- NOAA charting explainer for nautical distance · NOAA Ocean Service
- BIPM publication covering kilometre and metre units · BIPM
Last updated: 2026-01-01
Conversions use internationally defined factors. Provided for general use; verify critical measurements independently.