Square Kilometers - Acres Converter


Convert between square kilometers (km²) and acres (ac). This converter is part of the full area converter tool. Simply choose which unit you want to convert from and to, enter a value and click the 'convert' button. A reference chart can be found further down the page.

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Converting acres and square kilometers

Some commonly asked questions are included below, as well as a reference chart. When making manual conversions, you can use the converter at the top of this page to check your answer.

How many square kilometers are there in 1 acre?

There are 0.0040468564224 square kilometers in 1 acre. To convert from acres to square kilometers, multiply your figure by 0.0040468564224 (or divide by 247.10538146717) .

How many acres are there in 1 square kilometer?

There are 247.10538146717 acres in 1 square kilometer. To convert from square kilometers to acres, multiply your figure by 247.10538146717 (or divide by 0.0040468564224) .

In the chart below, figures are rounded to a maximum of 3 decimal places (6 with smaller numbers) to give approximations.

Acres and square kilometers reference chart

Acres Square Kilometers Square Kilometers Acres
0.1 0.000405 km² 0.1 24.711 ac
1 0.004 km² 1 247.105 ac
2 0.008 km² 2 494.211 ac
3 0.012 km² 3 741.316 ac
4 0.016 km² 4 988.422 ac
5 0.02 km² 5 1235.527 ac
6 0.024 km² 6 1482.632 ac
7 0.028 km² 7 1729.738 ac
8 0.032 km² 8 1976.843 ac
9 0.036 km² 9 2223.948 ac
10 0.04 km² 10 2471.054 ac
20 0.081 km² 20 4942.108 ac
30 0.121 km² 30 7413.161 ac
40 0.162 km² 40 9884.215 ac
50 0.202 km² 50 12355.269 ac
60 0.243 km² 60 14826.323 ac
70 0.283 km² 70 17297.377 ac
80 0.324 km² 80 19768.431 ac
90 0.364 km² 90 22239.484 ac
100 0.405 km² 100 24710.538 ac

What is an acre?

The acre is a unit of land commonly employed within North America and the Caribbean. It is equal to 4,047 square metres or 43,560 square feet. This measurement is roughly equivalent to 40 per cent of a hectare. Interestingly enough, the acre can trace its roots back to mediaeval times. It was defined as the area that could be ploughed in a single day with the help of an ox. One acre is approximately 76 per cent the size of a football field. Many suburban lots are between one-quarter and one-fifth of an acre in size. You can find out more about acres in the article, how big is an acre?

What is a square kilometer?

One kilometer (or 'kilometre' with British spelling) is equivalent to 1,000 meters. Therefore, a square kilometer can be expressed as one million square meters. This unit of distance and area can be used within landscaping, surveying and aerial photography. One square kilometer is also equal to 100 hectares. The city of Chester in the United Kingdom is roughly one square kilometer in size. The Manchester Golf Club is likewise one square kilometer in total.

Other individual area converters

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