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Open toolAcres (international) to Square kilometres
Convert acres (international) (ac) to square kilometres (km²) with a copyable result.
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THE QUICK GUIDE
How to use acres (international) to square kilometres
Enter a value in acres (international), choose your display precision, and select Convert. Use Swap units to calculate the reverse direction.
How it works
Area conversion: multiply the value in ac by 0.0040468564224 to obtain km². Both units are related through square metres.
A useful example
1 ac = 0.0040468564224 km².
Good to know
Uses area units as labelled. Floating-point arithmetic is approximate; results show up to 12 significant digits. Very large or small results use scientific notation.