How many acres are in one square kilometer?
One square kilometer is approximately 247.105381 acres.
Square Kilometers to Acres Conversion
Convert large land areas between square kilometers and acres.
Convert km² and acres
Enter an area and select the conversion direction.
About this converter
How to use Square Kilometers to Acres Conversion, plus the formulas and logic behind the results.
Tool description
One square kilometer contains one million square meters; one acre contains exactly 4,046.8564224 square meters.
How to use
- Enter the area value.
- Choose the direction matching the unit you entered.
- Select Calculate to apply the conversion factor.
- Review the result in square kilometers or acres.
Formulas & reference
acres = km² × 1,000,000 ÷ 4,046.8564224km² = acres × 4,046.8564224 ÷ 1,000,000
Calculation logic
The value is normalized through square meters using the exact acre definition.
Square Kilometers to Acres Conversion FAQ
Common questions about this conversion and how to interpret the result.
How many square kilometers is one acre?
One acre is 0.0040468564224 square kilometers.
Is km² the same as kilometers?
No. Square kilometers measure area; kilometers measure length.
How many square meters are in a km²?
There are exactly 1,000,000 square meters in one square kilometer.
Can I convert fractional acres?
Yes. Decimal values are supported in both directions.
Is the acre factor exact?
Yes. The international acre equals exactly 4,046.8564224 square meters.