Square Kilometers to Acres converter (km² to ac)
Convert Square Kilometers (km²) to Acres (ac) with this free calculator. Type a value, press Convert, and the page applies the same factor shown in the formula below — no rounded shortcut, and nothing is stored on a server.
Acres to Square Kilometers (ac to km²) ►
How to convert Square Kilometers to Acres
1 square kilometer (km²) is equal to 247.105 acres (ac).
ac = km² × 247.10538
Multiply the area in square kilometers by 247.10538:
Example: Convert 1 km² to ac:
ac = 1 × 247.10538 = 247.105 ac
What is a Square Kilometers?
The Square Kilometers (km²) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
What is a Acres?
The Acres (ac) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
This page converts area from Square Kilometers into Acres. One km² equals 247.10538 ac.
Square Kilometers to Acres conversion table
Common km² values and the matching ac result, calculated with the same factor as the widget. Highlight a nearby row if you want a quick check without entering a number.
| Square Kilometers (km²) | Acres (ac) |
|---|---|
| 1 km² | 247.10538 ac |
| 2 km² | 494.21076 ac |
| 5 km² | 1235.5269 ac |
| 10 km² | 2471.0538 ac |
| 20 km² | 4942.1076 ac |
| 50 km² | 12355.269 ac |
| 100 km² | 24710.538 ac |
How this calculator works
The form on this page is a Square Kilometers-to-Acres converter. After you enter a number, JavaScript multiplies or rearranges it with the published conversion factor and writes the ac result in the output box. The step-by-step panel repeats the arithmetic so you can copy it into homework or a spreadsheet.
Reviewed by Hamsen, founder of GigaTables and a biology engineer. See the about page for how formulas are checked before a tool is published.
FAQ
How many ac are in 1 km²?
1 km² = 247.10538 ac.
How do I convert Square Kilometers to Acres?
Multiply the area in square kilometers by 247.10538:
Is this km² to ac converter free?
Yes. GigaTables calculators are free to use in a browser. You do not need an account, and the values you type are not uploaded.