🗺️ US Survey Acres to Square Kilometers Converter

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Converted Value
1.01172

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⚡ US Survey Acres to Square Kilometers: the quick answer

1 ac (US) = 0.00404687 km² 1 US survey acre equals 0.00404687 square kilometers

To convert US survey acres to square kilometers, multiply the value by 0.00404687. To go the other way, multiply square kilometers by 247.104 to get US survey acres.

↔ Convert square kilometers to US survey acres instead

🧮 Formula

US Survey Acres to Square Kilometers
km² = ac (US) × 0.00404687
Square Kilometers to US Survey Acres
ac (US) = km² × 247.104

Where

  • ac (US) = the area in US survey acres
  • 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 US survey acre) ÷ (square meters per square kilometer).

📊 US Survey Acres to Square Kilometers conversion table

US Survey Acres (ac (US))Square Kilometers (km²)
1 ac (US)0.00404687 km²
2 ac (US)0.00809375 km²
5 ac (US)0.0202344 km²
10 ac (US)0.0404687 km²
20 ac (US)0.0809375 km²
50 ac (US)0.202344 km²
100 ac (US)0.404687 km²
500 ac (US)2.02344 km²
1,000 ac (US)4.04687 km²

✏️ Worked examples

Convert 25 US survey acres to square kilometers

25 ac (US) × 0.00404687 = 0.101172 km²

Try this example →

Convert 250 US survey acres to square kilometers

250 ac (US) × 0.00404687 = 1.01172 km²

Try this example →

📘 About these units

US survey acre (ac (US)). The US survey acre is 43,560 square US survey feet (4,046.8726 m²), used in US land records.

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 US survey acre?

There are 0.00404687 square kilometers in one US survey acre.

How do I convert US survey acres to square kilometers?

Multiply the number of US survey acres by 0.00404687. For example, 10 US survey acres equal 0.0404687 square kilometers.

How many US survey acres are in one square kilometer?

One square kilometer equals 247.104 US survey acres.

What people are saying
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Anonymous · 04 Oct 2026