Knots to km/h●
Knots in. Kilometres per hour out. Convert wind and boat speed.
Speed
Use a decimal point, for example 2.54. Scientific notation works too: 1e3.
Try a value
Pick an example to startThe formula
kilometres per hour = knots × 1.852
Multiply the number of knots by 1.852 to get kilometres per hour. To go the other way, divide by the same number.
A worked example
For 20 kn, multiply 20 by 1.852. The result is approximately 37.04 km/h.
20 × 1.852 ≈ 37.04 km/h
Quick reference
Reference values are rounded to 6 decimal places. Use the converter above for other values or precision.
| Knots (kn) | Kilometres per hour (km/h) |
|---|---|
| 1 | 1.852 |
| 5 | 9.26 |
| 10 | 18.52 |
| 15 | 27.78 |
| 20 | 37.04 |
| 25 | 46.3 |
| 30 | 55.56 |
| 35 | 64.82 |
| 50 | 92.6 |
All equivalent units
The same value, in every supported unit.
Speed conversions
For sailing, wind and flight.
Use this conversion for wind forecasts, sailing and aviation. One knot is one nautical mile per hour, exactly 1.852 km/h.
Calculation details & precision
Speed conversions use metres per second as the base unit. One km/h is 1/3.6 m/s. One mph is exactly 0.44704 m/s. One knot is one international nautical mile per hour: 1,852 metres in 3,600 seconds.
Automatic displays up to 12 significant digits. Choose 2, 4 or 6 decimal places in Precision for a shorter result. Displayed results are rounded; very large or small values use scientific notation.
Common questions
What is a knot?
A knot is one nautical mile per hour. A nautical mile is exactly 1852 metres.
How many kilometres per hour are in 20 knots?
20 kn is approximately 37.04 km/h. The converter can show more significant digits or round to a chosen number of decimal places.