🗺️ Area converter

Square Kilometer to Acre Converter

Convert square kilometers (km²) to acres (ac) instantly with the exact formula, a conversion table and chart.

km²

Results

Acres
247.105381467 ac
Same value in every unit

📊 Square Kilometer to Acre chart

Square Kilometer to Acre — plotted against square kilometer (km²).

How to convert square kilometers to acres

To convert square kilometers to acres, multiply by 247.105381467. Area conversions are essential for real estate, flooring, land surveys, farming and map reading.

ac = km² × 247.105381467 km² = ac ÷ 247.105381467
Square Kilometer to Acre conversion – km² to ac formula illustration
Square Kilometer (km²) → Acre (ac) at a glance.

Square Kilometer to Acre conversion table

Square Kilometer (km²)Acre (ac)
0.1 km²24.7105381467 ac
0.5 km²123.552690734 ac
1 km²247.105381467 ac
2 km²494.210762934 ac
3 km²741.316144401 ac
4 km²988.421525869 ac
5 km²1,235.52690734 ac
10 km²2,471.05381467 ac
20 km²4,942.10762934 ac
25 km²6,177.63453668 ac
50 km²12,355.2690734 ac
100 km²24,710.5381467 ac
500 km²123,552.690734 ac
1,000 km²247,105.381467 ac

About the units

Square Kilometer (km²)

A square kilometer equals 1,000,000 m² and measures cities, lakes and countries.

Acre (ac)

An acre equals 43,560 square feet (4,046.8564224 m²) and is used for land in the US and UK.

How to use this converter

  1. Type the number of square kilometers (km²) in the input box.
  2. The result in acres appears instantly — no button needed.
  3. See the same value in every other area unit just below.
  4. Use “Swap units” to convert acres back to square kilometers.

Tips for better results

  • Double-check which system a unit belongs to (for example US vs UK gallons).
  • Use the swap button to convert in the opposite direction instantly.
  • Bookmark the conversions you use most — each pair has its own page.

Frequently asked questions

How many acres are in one square kilometer?

One square kilometer equals 247.105381467 acres. 247.105381467 is the exact factor used by this converter.

How do I convert square kilometers to acres?

Multiply the value in square kilometers by 247.105381467. To go the other way, multiply acres by 0.0040468564224.

What is 10 km² in ac?

10 km² = 2,471.05381467 ac. Also, 5 km² = 1,235.52690734 ac and 100 km² = 24,710.5381467 ac.

What is the difference between a square kilometer and a acre?

A square kilometer equals 1,000,000 m² and measures cities, lakes and countries. An acre equals 43,560 square feet (4,046.8564224 m²) and is used for land in the US and UK.

Is this tool free and private?

Yes — the Square Kilometer to Acre is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.

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