Square Kilometers - Acres Converter


Convert between square kilometers and acres (km2 and ac) using this area conversion tool. This converter is part of the full area converter. Simply choose whether you want to convert square kilometers to acres or acres to square kilometers, enter a value and click the 'convert' button. Reference charts are available 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 4 decimal places (6 with smaller numbers) to give approximations.

Acres and square kilometers reference chart

Acres Square Kilometers Square Kilometers Acres
0.1 0.0004 0.1 24.7105
1 0.004 1 247.1054
2 0.0081 2 494.2108
3 0.0121 3 741.3161
4 0.0162 4 988.4215
5 0.0202 5 1235.5269
6 0.0243 6 1482.6323
7 0.0283 7 1729.7377
8 0.0324 8 1976.8431
9 0.0364 9 2223.9484
10 0.0405 10 2471.0538
20 0.0809 20 4942.1076
30 0.1214 30 7413.1614
40 0.1619 40 9884.2153
50 0.2023 50 12355.2691
60 0.2428 60 14826.3229
70 0.2833 70 17297.3767
80 0.3237 80 19768.4305
90 0.3642 90 22239.4843
100 0.4047 100 24710.5381

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

Ares and Acres, Cents and Acres, Hectares and Acres, Square Centimeters and Acres, Square Decimeters and Acres, Square Dekameters and Acres, Square Fathoms and Acres, Square Feet and Acres, Square Hectometers and Acres, Square Inches and Acres, Square Kilometers and Acres, Square Kilometers and Ares, Square Kilometers and Cents, Square Kilometers and Hectares, Square Kilometers and Square Centimeters, Square Kilometers and Square Decimeters, Square Kilometers and Square Dekameters, Square Kilometers and Square Fathoms, Square Kilometers and Square Feet, Square Kilometers and Square Hectometers, Square Kilometers and Square Inches, Square Meters and Acres, Square Meters and Square Kilometers, Square Miles and Acres, Square Miles and Square Kilometers, Square Millimeters and Acres, Square Millimeters and Square Kilometers, Square Rods and Acres, Square Rods and Square Kilometers, Square Yards and Acres, Square Yards and Square Kilometers,

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