What is 1 Acre Foot of Water? What is 1 Acre Foot of Water? TRRoutfitters2017-11-15T05:49:18+00:00 1.0 acre foot = 325,851 gallons Water is commonly measured in acre-feet. One acre-foot of water can fill one acre of What is 1 Acre Foot of Water?TRRoutfitters2017-11-15T05:49:18+00:00