Convert Gallons to Acre-Feet
Convert Gallons (gal) to Acre-Feet (ac ft) instantly and accurately.
Conversion Formula
ac ft = gal × 3.068883277e-6
About Gallons
A US gallon (gal) = 4 quarts = 128 fl oz ≈ 3.785 L. Gasoline, milk, water, paint, and pesticides are sold by the gallon in the US. About 20% smaller than the UK imperial gallon (4.546 L) - a critical difference when comparing fuel economy across the Atlantic. 1 US gal = 3.785 L = 4 qt = 128 fl oz.
About Acre-Feet
An acre-foot (ac ft) = the volume covering 1 acre to 1 ft depth ≈ 1,233.5 m³ (325,851 US gal). Almost exclusively used in US water resource management. California's Lake Shasta: 4.55 million ac ft at capacity. A typical US household uses ~0.5-1 ac ft/year. Water rights on the Colorado and Sacramento rivers are traded in acre-feet. 1 ac ft ≈ 1,233.5 m³.
Quick Reference Table
| Gallons (gal) | Acre-Feet (ac ft) |
|---|---|
| 1 gal | 3.069 × 10-6 ac ft |
| 2 gal | 6.138 × 10-6 ac ft |
| 5 gal | 1.534 × 10-5 ac ft |
| 10 gal | 3.069 × 10-5 ac ft |
| 25 gal | 7.672 × 10-5 ac ft |
| 50 gal | 0.000153444 ac ft |
| 100 gal | 0.000306888 ac ft |