🗺️ Square Nautical Miles to Square Kilometers Converter

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Converted Value
3.4299

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⚡ Square Nautical Miles to Square Kilometers: the quick answer

1 NM² = 3.4299 km² 1 square nautical mile equals 3.4299 square kilometers

To convert square nautical miles to square kilometers, multiply the value by 3.4299. To go the other way, multiply square kilometers by 0.291553 to get square nautical miles.

↔ Convert square kilometers to square nautical miles instead

🧮 Formula

Square Nautical Miles to Square Kilometers
km² = NM² × 3.4299
Square Kilometers to Square Nautical Miles
NM² = km² × 0.291553

Where

  • NM² = the area in square nautical miles
  • km² = the area in square kilometers
Every unit here is defined by its area in square meters, so the conversion factor is (square meters per square nautical mile) ÷ (square meters per square kilometer).

📊 Square Nautical Miles to Square Kilometers conversion table

Square Nautical Miles (NM²)Square Kilometers (km²)
1 NM²3.4299 km²
2 NM²6.85981 km²
5 NM²17.1495 km²
10 NM²34.299 km²
20 NM²68.5981 km²
50 NM²171.495 km²
100 NM²342.99 km²
500 NM²1,714.95 km²
1,000 NM²3,429.9 km²

✏️ Worked examples

Convert 25 square nautical miles to square kilometers

25 NM² × 3.4299 = 85.7476 km²

Try this example →

Convert 250 square nautical miles to square kilometers

250 NM² × 3.4299 = 857.476 km²

Try this example →

📘 About these units

Square nautical mile (NM²). A square nautical mile is 3,429,904 m², used for sea areas and fishing grounds.

Square kilometer (km²). A square kilometer is one million square meters (100 hectares), used for countries, cities and lakes.

❓ Frequently asked questions

How many square kilometers are in one square nautical mile?

There are 3.4299 square kilometers in one square nautical mile.

How do I convert square nautical miles to square kilometers?

Multiply the number of square nautical miles by 3.4299. For example, 10 square nautical miles equal 34.299 square kilometers.

How many square nautical miles are in one square kilometer?

One square kilometer equals 0.291553 square nautical miles.

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Anonymous · 04 Oct 2026