Kilometers to Nautical Miles
Convert km to nmi quickly with this free online calculator. The page explains the conversion rule, gives practical examples and provides a quick reference table.
1 kilometer equals about 0.539957 nautical miles.
How to use the Kilometers to Nautical Miles
- Enter the number you want to convert.
- Confirm the source unit shown beside the input.
- Choose decimal precision if you need more or less detail.
- Read the converted result.
- Copy the result when you need to use it elsewhere.
How the conversion works
1 kilometer equals about 0.539957 nautical miles.
For a simple fixed-factor conversion, the calculator multiplies the entered value by the stated factor. Temperature scales and certain specialized tools use their specific mathematical relationship instead.
Common km to nmi conversions
| km | nmi |
|---|---|
| 1 km | 0.539957 nmi |
| 2 km | 1.079914 nmi |
| 5 km | 2.699784 nmi |
| 10 km | 5.399568 nmi |
| 20 km | 10.799136 nmi |
| 50 km | 26.99784 nmi |
Example
For example, entering 1 km gives approximately 0.539957 nmi using the rule above. Change the input to test your own value.
Frequently asked questions
Accuracy note: This calculator is a practical reference. For regulated, safety-critical or specialized work, verify the result against the applicable standard.
Page reviewed: August 24, 2026.