Convert knots to kilometers per hour
Knot (kn) to kilometer per hour (km/h). One knot equals 1.852 kilometers per hour.
Formula
Knot to kilometer per hour conversion table
| Knots | Kilometers per hour | Kilometers per hour | Knots |
|---|---|---|---|
| 1 kn | 1.852 km/h | 1 km/h | 0.539957 kn |
| 2 kn | 3.704 km/h | 2 km/h | 1.0799 kn |
| 3 kn | 5.556 km/h | 3 km/h | 1.6199 kn |
| 5 kn | 9.26 km/h | 5 km/h | 2.6998 kn |
| 10 kn | 18.52 km/h | 10 km/h | 5.3996 kn |
| 20 kn | 37.04 km/h | 20 km/h | 10.7991 kn |
| 50 kn | 92.6 km/h | 50 km/h | 26.9978 kn |
| 100 kn | 185.2 km/h | 100 km/h | 53.9957 kn |
| 500 kn | 926 km/h | 500 km/h | 269.98 kn |
| 1000 kn | 1852 km/h | 1000 km/h | 539.96 kn |
To convert knots to kilometers per hour, multiply the number of knots by 1.852. One knot equals 1.852 kilometers per hour, and one kilometer per hour equals 0.539957 knots, so the relationship is fixed and exact. As a worked example, 10 kn comes to 18.52 km/h. Enter your own figure in the converter above to get an instant answer, or use the swap button to flip the direction. This is a speed conversion, and like every tool on UnitGlide it runs locally in your browser with no account or upload required. The table further down shows a range of common knot values already worked out in kilometers per hour, plus the reverse kilometer per hour to knot direction, which is handy for quick reference or double-checking a result by hand.
Knot to kilometer per hour in practice
Knots to kilometres per hour is the conversion that translates a boat, an aircraft or a storm from the world of nautical charts into the km/h a land-based audience understands.
At sea, in the air and in the forecast
Ships and aircraft report speed in knots, and so do marine and tropical-storm warnings. A cruising yacht at 6 knots is doing 11.1 km/h, an airliner at 500 knots is at 926 km/h, and a hurricane's 90-knot sustained winds are 167 km/h. Converting to km/h is usually about making those figures legible to people who never read a chart or a METAR.
A knot is already 'per hour'
One knot is one nautical mile per hour, so the phrase 'knots per hour' is a mistake: it would describe an acceleration, not a speed. The confusion is common enough that it is worth saying plainly, because a boat does not do '10 knots per hour' when it holds a steady 10 knots.
The nautical mile behind it
The knot rests on the nautical mile of 1,852 metres, which is longer than the statute land mile, so a knot is a touch faster than an ordinary mph. That extra length is not arbitrary: a nautical mile is one minute of latitude, which is why the unit persists in navigation even where everything else has gone metric.
A deck-side estimate
The exact factor is 1.852, so a knot is a little under two km/h. For a rough estimate on deck, doubling the knots and trimming a little works: 20 knots doubled is 40, and the true answer is 37 km/h. For anything navigational, use the full factor rather than the round double.
And to miles per hour
Because much of the boating and aviation world also thinks in mph, it helps to know a knot is about 1.15 mph, a smaller step than the jump to km/h. So a 40-knot gale is roughly 46 mph as well as 74 km/h, and quoting all three lets a mixed audience of sailors, pilots and landlubbers picture the same wind.
Frequently asked questions
How many kilometers per hour are in a knot?
One knot equals 1.852 kilometers per hour. The ratio is constant, so you can multiply any number of knots by 1.852 to get kilometers per hour.
What is the formula to convert knots to kilometers per hour?
Use kilometers per hour = knots × 1.852. UnitGlide applies this exact formula for every value, so results stay accurate across the whole range.
How do I convert kilometers per hour back to knots?
Go the other way by using one kilometer per hour equals 0.539957 knots. You can also press the swap button in the converter above to flip the direction in one click.
Is this knot to kilometer per hour converter accurate?
Yes. It uses internationally defined SI conversion factors, as maintained by the BIPM, and all math runs in your browser so nothing is rounded away on a server. For everyday use the displayed precision is more than enough.