Convert Acre Feet (ac⋅ft) into other units of volume e.g. m³, cm³, mm³, cup, fl oz, ft³, gal, in³, L, fl oz, pt, Tsp

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This quick and easy calculator will convert Acre Feet (ac⋅ft) into other units of volume e.g. m³, cm³, mm³, cup, fl oz, ft³, gal, in³, L, fl oz, pt, Tsp

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Unit Information

Acre Foot
/ˈeɪkə fiːt/
Symbol: ac⋅ft
Unit System: US Customary

What is the Acre Foot?

The acre-foot is a unit of volume in the US customary unit system with the symbol ac⋅ft.

It represents the volume contained in a box measuring 660 feet long, 66 feet wide and 1 foot deep. This can be thought of a box the size of an acre but 1 foot deep.

It is approximately the same volume as an 8 lane swimming pool; 25 metres in length, 3 metres deep and 16 metres wide (assuming lanes are 2 metres wide).

It is still used in the US despite its links to the much-outdated imperial system of units. For example a "rule of thumb" is that an average suburban family's annual water usage should be around 1 acre-foot. This is equal to just under 3.4 m³ daily.