LENGTH CONVERSION
Kilometres to Nautical miles converter
Convert kilometres to nautical miles instantly.
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No regional currency, unit or language profile is applied. This choice does not convert values or change formulas, results, routes or legal guidance.
1 km equals
0.539956803456 nmiInstant kilometres to nautical miles conversionCalculated locally in your browser using the stated conversion formula.Kilometres to Nautical miles conversion guide
Use this calculator when comparing measurements, checking specifications, planning travel, preparing materials or reading information published in another unit system. Enter any value above to receive the converted result immediately.
Worked example: 10 km equals 5.39956803 nmi. The displayed result is rounded for readability while the calculator retains full numeric precision.
About Kilometres and Nautical miles
- Kilometres
- A kilometre equals exactly 1,000 metres. International System of Units (SI) or an SI-derived metric unit.
- Nautical miles
- A nautical mile equals exactly 1,852 metres and is used in marine and aviation navigation. Imperial or US customary measurement, depending on the unit.
Precision and common mistakes
The kilometre-to-metre relationship is exact. The nautical-mile relationship is exact. The calculator keeps the full catalogued factor internally and rounds only the displayed value.
- Kilometres measure distance; kilometres per hour measure speed.
- Do not substitute statute miles for nautical miles in navigation.
- Keep the original value and unit together when copying a result, especially when specifications use several measurement systems.
Kilometres to Nautical miles table
1 km0.5399568 nmi
5 km2.69978402 nmi
10 km5.39956803 nmi
25 km13.49892009 nmi
50 km26.99784017 nmi
100 km53.99568035 nmi
Frequently asked questions
How do I convert kilometres to nautical miles?
Multiply the kilometres value by 0.539956803456. For example, 10 km equals 5.39956803 nmi.
Is this Kilometres to Nautical miles conversion accurate?
The calculator uses the stated conversion relationship and keeps full internal precision before formatting the displayed answer. For regulated or safety-critical work, confirm the required rounding standard.
Can I use this converter on a phone?
Yes. The calculator is responsive, keyboard accessible and performs the conversion locally in a modern browser without requiring an account.
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Verification and calculation details
- Purpose
- Kilometres to Nautical miles converter
- Variables and units
- Use the labelled fields and units shown in the calculator. Results use those units unless a conversion is stated.
- Formula and method
- The exact formula and worked example are shown below. Deterministic formula executed locally in the browser.
- Assumptions
- Only entered values and stated assumptions are included. Local fees, rules and professional requirements are excluded unless explicitly shown.
- Engine version
- 1.0.0
- Production verification baseline
- Release 63 · source
998803f - Verification run
release-v63-2026-09-20- Last verified
- — Automated release checks passing
Read the Calculation Standard · Report a calculation or source issue
How this calculator works
Nautical miles = Kilometres × 0.539956803456.
Important notes
Results are estimates based on the values entered. Confirm rates, prices, units and professional requirements that apply in your location. Review the Answer Atlas Calculation Standard and corrections policy for formula, privacy and correction rules.