Speed converter
Kilometers per Hour to Knots
Kilometers per Hour and Knots measure the same quantity in different unit systems. The relationship is 1 km/h = 0.5399568 kn, which gives 0.5399568 kn per km/h. Below you can convert any value, check a worked example and read the full chart.
Formula 1 km/h = 0.5399568 kn
Need the other direction? Knots to Kilometers per Hour.
How to convert Kilometers per Hour to Knots
Kilometres per hour is the standard road-speed unit in most of the world. One knot is one nautical mile per hour, exactly 1.852 km/h.
To convert Kilometers per Hour to Knots, multiply the value in km/h by 0.5399568. For example, 10 km/h × 0.5399568 = 5.399568 kn. This works because the ratio between the two units is constant for every value in speed.
Worked examples
| km/h | kn |
|---|---|
| 1 km/h | 0.5399568 kn |
| 2.5 km/h | 1.349892 kn |
| 5 km/h | 2.699784 kn |
| 10 km/h | 5.399568 kn |
| 25 km/h | 13.49892 kn |
| 50 km/h | 26.99784 kn |
| 100 km/h | 53.99568 kn |
Reverse conversion
| kn | km/h |
|---|---|
| 1 kn | 1.852 km/h |
| 5 kn | 9.26 km/h |
| 10 kn | 18.52 km/h |
| 25 kn | 46.3 km/h |
| 50 kn | 92.6 km/h |
| 100 kn | 185.2 km/h |
When this conversion is useful
This is the calculation you need when you are reading a car spec, a weather report or an aviation document from another country. Because the factor is fixed, you can use the same number for a single measurement or for a batch: 1,000 km/h is 539.956804 kn.
Is the conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Reference: BIPM SI Brochure and NIST SP 811. Last reviewed: 2026-11-01.
km/h to kn conversion chart
The chart lists the most requested values. For a value that is not here, use the converter at the top of the page.
| Kilometers per Hour (km/h) | Knots (kn) |
|---|---|
| 1 km/h | 0.5399568 kn |
| 2 km/h | 1.079914 kn |
| 3 km/h | 1.61987 kn |
| 4 km/h | 2.159827 kn |
| 5 km/h | 2.699784 kn |
| 6 km/h | 3.239741 kn |
| 7 km/h | 3.779698 kn |
| 8 km/h | 4.319654 kn |
| 9 km/h | 4.859611 kn |
| 10 km/h | 5.399568 kn |
| 11 km/h | 5.939525 kn |
| 12 km/h | 6.479482 kn |
| 13 km/h | 7.019438 kn |
| 14 km/h | 7.559395 kn |
| 15 km/h | 8.099352 kn |
| 16 km/h | 8.639309 kn |
| 17 km/h | 9.179266 kn |
| 18 km/h | 9.719222 kn |
| 19 km/h | 10.259179 kn |
| 20 km/h | 10.799136 kn |
| 21 km/h | 11.339093 kn |
| 22 km/h | 11.87905 kn |
| 23 km/h | 12.419006 kn |
| 24 km/h | 12.958963 kn |
| 25 km/h | 13.49892 kn |
| 26 km/h | 14.038877 kn |
| 27 km/h | 14.578834 kn |
| 28 km/h | 15.11879 kn |
| 29 km/h | 15.658747 kn |
| 30 km/h | 16.198704 kn |
| 31 km/h | 16.738661 kn |
| 32 km/h | 17.278618 kn |
| 33 km/h | 17.818575 kn |
| 34 km/h | 18.358531 kn |
| 35 km/h | 18.898488 kn |
| 36 km/h | 19.438445 kn |
| 37 km/h | 19.978402 kn |
| 38 km/h | 20.518359 kn |
| 39 km/h | 21.058315 kn |
| 40 km/h | 21.598272 kn |
| 41 km/h | 22.138229 kn |
| 42 km/h | 22.678186 kn |
| 43 km/h | 23.218143 kn |
| 44 km/h | 23.758099 kn |
| 45 km/h | 24.298056 kn |
| 46 km/h | 24.838013 kn |
| 47 km/h | 25.37797 kn |
| 48 km/h | 25.917927 kn |
| 49 km/h | 26.457883 kn |
| 50 km/h | 26.99784 kn |
| 60 km/h | 32.397408 kn |
| 70 km/h | 37.796976 kn |
| 80 km/h | 43.196544 kn |
| 90 km/h | 48.596112 kn |
| 100 km/h | 53.99568 kn |
Frequently asked questions
How many Knots are in 1 Kilometers per Hour?
1 km/h equals 0.5399568 kn.
How do I convert Kilometers per Hour to Knots?
Multiply the km/h value by 0.5399568. Example: 25 km/h = 13.49892 kn.
What is 2.5 km/h in kn?
2.5 km/h = 1.349892 kn.
Is the km/h to kn conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Does the calculator work offline?
Yes. The conversion runs in your browser with JavaScript, so it works after the page has loaded, even without a connection.