Acre-foot

acre-foot
An acre-foot volume (not drawn to scale)
General information
Unit system	US Customary units
Unit of	Volume
Symbol	ac⋅ft
Conversions
1 ac⋅ft in ...	... is equal to ...
SI units	≈ 1,233.5 m3
US customary units	43,560 cu ft
US customary units	≈ 325,850 US gal
Imperial units	≈ 271,330 imp gal

The acre-foot is a non-SI unit of volume equal to about 1,233 m³ commonly used in the United States in reference to large-scale water resources, such as reservoirs, aqueducts, canals, sewer flow capacity, irrigation water,^[1] and river flows.

An acre-foot equals approximately an eight-lane swimming pool, 82 ft (25 m) long, 52 ft (16 m) wide and 9.8 ft (3 m) deep.