Convert Cups to Acre-Feet
Convert Cups (cup) to Acre-Feet (ac ft) instantly and accurately.
Conversion Formula
ac ft = cup × 1.918052048e-7
About Cups
A cup = 8 fl oz = 16 tbsp ≈ 236.6 mL - the fundamental unit of American cooking. Almost every US recipe uses cups for dry and liquid ingredients. The US customary cup (236.588 mL) differs from the US legal cup (240 mL, used in nutrition labelling) and the metric cup (Australia/Canada: 250 mL). Kitchen sets come in 1/4, 1/3, 1/2, and 1 cup sizes. 2 cups = 1 US pint.
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
| Cups (cup) | Acre-Feet (ac ft) |
|---|---|
| 1 cup | 1.918 × 10-7 ac ft |
| 2 cup | 3.836 × 10-7 ac ft |
| 5 cup | 9.59 × 10-7 ac ft |
| 10 cup | 1.918 × 10-6 ac ft |
| 25 cup | 4.795 × 10-6 ac ft |
| 50 cup | 9.59 × 10-6 ac ft |
| 100 cup | 1.918 × 10-5 ac ft |