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# Acres to km² Conversion Factor

The acre to km² conversion factor is 0.004047

To find how many acres are there in an square kilometer, just multiply the quantity in acres by 0.

You can also use the formula to convert from acres to km² below:

Value in square kilometers = value in acres × 0.004047

## Examples:

Convert half acre to square kilometers:
half acres = 0.5 × 0.00405 = 0.00202 square kilometers.

Convert an acre to square kilometers:
an acre = 1 × 0.00405 = 0.00405 square kilometers.

Convert two acres to square kilometers:
two acres = 2 × 0.00405 = 0.00809 square kilometers.

Note: All values are rounded to 3 significant figures.

### All In One Unit Converter

Please, choose a physical quantity, two units, then type a value in any of the boxes above.

## More Examples:

Convert three acres to square kilometers three acres = 3 × 0.0121 = 0.0121 square kilometers.

Convert 4 acres to square kilometers 4 acres = 4 × 0.0162 = 0.0162 square kilometers.

Convert half acre to square kilometers half acres = 0.5 × 0.00202 = 0.00202 square kilometers.

Convert a quarter acre to square kilometers a quarter acres = 0.25 × 0.00101 = 0.00101 square kilometers.

Convert one-fifth acre to square kilometers one-fifth acres = 0.2 × 0.000809 = 0.000809 square kilometers.

Convert one-eighth acre to square kilometers one-eighth acres = 0.125 × 0.000506 = 0.000506 square kilometers.

Note: All values are rounded to 3 significant figures.

## More conversion Factors

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