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Convert Acres to Square Kilometers

1 acre = 0.004046856 square kilometers. Type any value below to convert in either direction — the calculation happens in your browser.

Acres to Square Kilometers formula

Multiply the number of acres by 0.004046856 to get square kilometers.

square kilometers = acres × 0.004046856

To go the other way: divide the number of square kilometers by 0.004046856, or multiply by 247.105381.

acres = square kilometers ÷ 0.004046856

Acres to Square Kilometers conversion table

AcresSquare Kilometers
1 ac0.004046856 km²
2 ac0.008093713 km²
3 ac0.01214057 km²
4 ac0.01618743 km²
5 ac0.02023428 km²
6 ac0.02428114 km²
7 ac0.02832799 km²
8 ac0.03237485 km²
9 ac0.03642171 km²
10 ac0.04046856 km²
15 ac0.06070285 km²
20 ac0.08093713 km²
25 ac0.1011714 km²
30 ac0.1214057 km²
40 ac0.1618743 km²
50 ac0.2023428 km²
75 ac0.3035142 km²
100 ac0.4046856 km²
250 ac1.011714 km²
500 ac2.023428 km²
1,000 ac4.046856 km²

Square Kilometers to Acres conversion table

Square KilometersAcres
1 km²247.105381 ac
2 km²494.210763 ac
3 km²741.316144 ac
4 km²988.421526 ac
5 km²1,235.527 ac
6 km²1,482.632 ac
7 km²1,729.738 ac
8 km²1,976.843 ac
9 km²2,223.948 ac
10 km²2,471.054 ac

About the acre

An acre is 43,560 square feet, about 4,047 square metres — roughly a US football field without the end zones.

About the square kilometer

A square kilometre is one million square metres and is used for the area of cities and regions.

Frequently asked questions

How many square kilometers are in a acre?

There are 0.004046856 square kilometers in one acre.

How many acres are in a square kilometer?

There are 247.105381 acres in one square kilometer.

Is this conversion exact?

The ratio between the acre and the square kilometer is fixed by definition, so the conversion is exact — the figures shown here are rounded for readability only.

What is 10 acres in square kilometers?

10 acres equals 0.04046856 square kilometers.

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