In 1 acres there are 0.004047 square kilometer. Meanwhile in 1 square kilometer there are 247.105381 acres. Keep reading to learn more about each unit of measure and how they are calculated. Or just use the Square kilometer to Acres calculator above to convert any number.
* Values rounded to 6 decimal places for readability
To convert acres to square kilometers (km²), use this fixed conversion factor:
Formula (acres to km²):
Quick examples:
Tip: If you need a quick estimate, you can round the factor to 0.00405 km² per acre for rough results.
1 acre equals 0.0040468564224 square kilometers.
A quick way to remember it: acres are much smaller than a square kilometer.
1 square kilometer equals 247.105381 acres.
This helps when you need to convert a large land area into acres.
Use this formula:
square kilometers = acres × 0.0040468564224
It works for any number of acres, from small lots to large tracts.
Use this formula:
acres = square kilometers × 247.105381
This is common for maps, land records, and area planning.
An acre is a traditional land unit used in the US and other places.
A square kilometer is a metric unit based on meters, so it scales up fast.
That’s why 1 square kilometer contains about 247 acres.
For a rough estimate, divide acres by 247.
square kilometers ≈ acres ÷ 247
This gives a close answer for quick checks, but it’s not exact.
10 acres equals:
10 × 0.0040468564224 = 0.040468564224 square kilometers
That’s about 0.0405 km² when rounded.
50 acres equals:
50 × 0.0040468564224 = 0.20234282112 square kilometers
That’s about 0.2023 km².
100 acres equals:
100 × 0.0040468564224 = 0.40468564224 square kilometers
That’s about 0.4047 km².
It depends on what you need:
Yes. Both measure area, not length or distance.
They describe how much surface a piece of land covers.
No. The math stays the same everywhere.
An acre is a fixed unit, and a square kilometer is always 1,000 meters by 1,000 meters.
The Calculate Box tool to convert acres to square kilometer uses the open source script Convert.js to convert units of measurement. To use this tool, simply type a acres value in the box and have it instantly converted to square kilometer.