Kilometres to nautical miles – convert km to nmi
Convert kilometres to nautical miles (km to nmi) when you want to turn land-based distances into marine or aviation distances. This page opens the main length converter with km → nmi pre-selected.
Open the interactive km → nmi converter:
Use main converter (km → nmi) or switch to nmi → kmOn the homepage you can also convert kilometres to miles, feet, meters, and more with the same dropdowns.
Quick reference: km to nautical miles
The converter uses the exact relationship 1 nmi = 1.852 km, which means:
1 km ≈ 0.53996 nmi.
| Kilometres (km) | Nautical miles (nmi, approx.) |
|---|---|
| 1 km | 0.54 nmi |
| 5 km | 2.70 nmi |
| 10 km | 5.40 nmi |
| 25 km | 13.50 nmi |
| 50 km | 27.00 nmi |
| 100 km | 54.00 nmi |
Why convert kilometres to nautical miles?
Typical uses include:
- Converting coastal distances on maps into nautical miles for sailing.
- Comparing ferry or cruise routes with overland journeys.
- Working through navigation exercises that mix km and nmi.
- Checking aviation route lengths when your map is labelled in kilometres.
More navigation & distance converters
The homepage converter keeps all length units internally consistent, converting everything via meters before switching to the output unit you choose.