Convert Acre to Square Kilometre

What is a Acre to Square Kilometre conversion?

One acre (ac) is equal to 0.0040468564 square kilometre (km²). This relationship is fixed by international measurement standards and does not change. To convert any number of acre to square kilometre, multiply your value by 0.0040468564; to go the other way, divide by 0.0040468564.

How to convert Acre to Square Kilometre

The conversion formula is: 1 ac = 0.0040468564 km². Enter any value into the converter above and the result updates instantly. The formula is also shown alongside the answer so you can check the working or use it in your own calculations.

Where is this conversion used?

Area conversions are critical in real estate, agriculture, land surveying, urban planning, and interior decoration. Metric units include square metres and hectares; imperial units include square feet, acres, and square miles. Estate agents, farmers, architects, cartographers, and garden designers depend on area conversions. In the UK, residential floor space is usually quoted in square feet or square metres, while agricultural land is measured in acres or hectares.

Helpful tip

One football pitch is approximately 7,140 square metres (1.76 acres or 0.714 hectares) — a useful mental reference when estimating large areas.