Knots to KM/H Converter
Convert knots to kilometers per hour instantly, with a reference table for wind, aviation and marine speeds.
Knots to KMH Converter
1 kn = 1.852 km/h
Multiply knots by 1.852 to get kilometers per hour.
The link carries the values you entered, so whoever opens it sees the same result. Nothing is stored on our side — the numbers travel in the link itself.
Knots to kilometers per hour reference table
The conversions people look up most often, rounded to 4 decimal places.
| Knot (kn) | Kilometer per hour (km/h) |
|---|---|
| 1 kn | 1.852 km/h |
| 5 kn | 9.26 km/h |
| 10 kn | 18.52 km/h |
| 15 kn | 27.78 km/h |
| 20 kn | 37.04 km/h |
| 25 kn | 46.3 km/h |
| 30 kn | 55.56 km/h |
| 40 kn | 74.08 km/h |
| 50 kn | 92.6 km/h |
| 64 kn | 118.528 km/h |
| 100 kn | 185.2 km/h |
| 300 kn | 555.6 km/h |
| 500 kn | 926 km/h |
How the knots to kmh converter calculation works
A knot is one nautical mile per hour, and a nautical mile is exactly 1.852 km:
km/h = knots × 1.852
This is the cleanest of the speed conversions, because the underlying nautical mile was defined as 1,852 metres exactly in 1929. No rounding enters anywhere.
The Beaufort scale, still used in marine forecasts, is defined in knots:
| Force | Knots | km/h | Description |
|---|---|---|---|
| 4 | 11–16 | 20–30 | Moderate breeze |
| 6 | 22–27 | 41–50 | Strong breeze |
| 8 | 34–40 | 63–74 | Gale |
| 10 | 48–55 | 89–102 | Storm |
| 12 | 64+ | 118+ | Hurricane force |
Most European marine forecasts give wind in knots and land forecasts in km/h, so the same weather system is described in two units depending on which side of the coast you are on.
Other everyday figures:
- 10 knots → 18.5 km/h — a comfortable sailing breeze
- 20 knots → 37.0 km/h — a fast cruising yacht
- 140 knots → 259.3 km/h — airliner approach speed
- 470 knots → 870.4 km/h — airliner cruise
The mental shortcut is double it and take off 7%: 20 knots → 40 → 37.2, against a true 37.04. Or just double for a fast upper bound.
Aviation keeps knots worldwide, including in fully metric countries, because international air navigation standardised on them and a change would be more dangerous than the inconsistency.
Frequently asked questions
How do I convert knots to kilometers per hour?
Multiply the number of knots by 1.852 to get kilometers per hour.
How many kilometers per hour are in 20 kn?
20 kn equals 37.0400 km/h. The reference table on this page lists the other values people look up most often.
How do I convert kilometers per hour back to knots?
Divide the number of kilometers per hour by 1.852, or use the swap control on the converter above.
Is this conversion exact?
Yes. The factor is fixed by international definition rather than measured, so the conversion is exact - only the displayed rounding limits precision.
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