# Knots to km/h Converter URL: https://speedycalculator.com/calculators/conversion/knots-to-kph/ Last updated: 2026-10-25 > Convert knots (kn) to kilometres per hour (km/h): 1 knot = 1.852 km/h, so multiply by 1.852 or divide by 0.5399568. Both fields are editable, so you can also type in kilometres per hour and get knots back. ## Inputs - Knots (kn) ## Results - Kilometres per hour ## Formula ``` 1 kn = 1.852 km/h 1 km/h = 0.5399568 kn km/h = kn × 1.852 ``` ## Explanation A knot is one nautical mile per hour, exactly 1.852 km/h. Wind speeds in marine forecasts and aircraft speeds are given in knots. ### How to use the Knots to km/h Converter - Type the number of knots into the **Knots** field. Decimals such as 5 are fine. - Read the answer in **Kilometres per hour** – it updates as you type, with no button to press. - To convert the other way, type into **Kilometres per hour** and the knots are recalculated. - Press **Copy results** to copy both values with the page title, or **Copy link** to share this exact conversion. This page converts only kn ⇄ km/h. Need a different unit? Use the general speed converter, where you can choose any “from” and “to” unit. ### How it works Both units measure speed, so they are always in the same ratio: one knot equals 1.852 kilometres per hour. The calculator multiplies the number of knots you type by 1.852 to give kilometres per hour, and when you type into the kilometres per hour field it divides by the same factor to give knots. Because the ratio never changes, doubling the knots always doubles the kilometres per hour. Results are calculated at full precision and rounded only for display (up to eight decimal places, with very large or small values shown in scientific notation). ### How to convert knots to kilometres per hour - Write down the value in knots, for example **10 kn**. - Multiply by the conversion factor 1.852 (because 1 knot = 1.852 km/h). - 10 × 1.852 = **18.52 km/h**. - To go back from kilometres per hour to knots, divide by 1.852 – or multiply by 0.5399568. ### kn to km/h conversion table KnotsKilometres per hourKilometres per hourKnots1 kn1.852 km/h1 km/h0.5399568 kn5 kn9.26 km/h2 km/h1.0799136 kn10 kn18.52 km/h5 km/h2.699784 kn15 kn27.78 km/h10 km/h5.399568 kn20 kn37.04 km/h20 km/h10.799136 kn25 kn46.3 km/h50 km/h26.99784 kn30 kn55.56 km/h100 km/h53.99568 kn50 kn92.6 km/h1,000 km/h539.9568 kn100 kn185.2 km/h250 kn463 km/h450 kn833.4 km/h ### What is a knot? A knot is one nautical mile per hour, exactly 1.852 km/h. Ships, aircraft and marine weather forecasts use knots. ### What is a kilometre per hour? Kilometres per hour is the unit on road signs and speedometers in most countries. 100 km/h is about 62 mph. ### Quick mental conversion For a fast estimate, multiply knots by about **1.9** to get kilometres per hour; the error is about 2.6%. Use the calculator above when you need the exact figure. ### Common mistakes to avoid Confusing knots with mph, and mbps internet speeds (bits) with mb/s download speeds (bytes). ## Worked example Inputs — Knots: 10 kn. Results — **Kilometres per hour = 18.52 km/h**. ## FAQ **How many km/h is 10 knots?** 18.52 km/h. **How many knots is 100 km/h?** About 54 kn. **How do I convert knots to kilometres per hour?** Multiply the number of knots by 1.852. For example, 10 kn × 1.852 = 18.52 km/h. **How do I convert kilometres per hour back to knots?** Divide by 1.852 (or multiply by 0.5399568), or simply type the value into the kilometres per hour field above. **What is 100 kn in kilometres per hour?** 100 kn = 185.2 km/h. **What is 5 kn in kilometres per hour?** 5 kn = 9.26 km/h. **Is this conversion exact?** Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit. **Can I convert to other units on this page?** This page converts only between knots and kilometres per hour. To pick any speed unit, use the general speed converter linked under Related calculators. **What formula does the Knots to km/h Converter use?** 1 kn = 1.852 km/h. ## Sources - [NIST Special Publication 811 – Guide for the Use of the International System of Units](https://www.nist.gov/pml/special-publication-811) - [NIST Handbook 44 Appendix C – General tables of units of measurement](https://www.nist.gov/pml/owm/nist-handbook-44-current-edition)