Calculate gallons from acres and water depth, or reverse-calculate the required depth or irrigated area, with acre-inch, liter, cubic-foot, and runtime conversions.
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Acre-Inch to Gallons Formula
The following formula is used to calculate the number of gallons from acre-inches.
Variables:
- G is the number of gallons
- AI is the acre-inches
- CF is the conversion factor (Gallons per Acre-Inch)
To calculate the number of gallons, multiply the acre-inches by the conversion factor. The exact US liquid conversion is 27,154.285714… gallons per acre-inch (43,560 × 144 ÷ 231).
| Acre-Inches | US Gallons (gal) |
|---|---|
| 1/16 | 1697.143 |
| ⅛ | 3394.286 |
| 1/6 | 4525.714 |
| ¼ | 6788.571 |
| ⅓ | 9051.429 |
| ⅜ | 10182.857 |
| ½ | 13577.143 |
| ⅝ | 16971.429 |
| ⅔ | 18102.857 |
| ¾ | 20365.714 |
| ⅞ | 23760.000 |
| 1 | 27154.286 |
| 1¼ | 33942.857 |
| 1⅓ | 36205.714 |
| 1½ | 40731.429 |
| 1¾ | 47520.000 |
| 2 | 54308.571 |
| 2½ | 67885.714 |
| 3 | 81462.857 |
| 4 | 108617.143 |
| *US customary: 1 acre‑inch ≈ 27,154.286 US liquid gallons (table rounded to three decimals). | |
What is an Acre-Inch?
An acre-inch is a unit of volume commonly used in agriculture to measure the amount of water applied to a field. It represents the volume of water that would cover one acre of land to a depth of one inch. This unit is particularly useful for irrigation planning and water management, as it helps farmers and water resource managers quantify the amount of water needed for crops over a given area. One acre-inch is equivalent to approximately 27,154.286 US liquid gallons of water.
How to Calculate Acre-Inch to Gallons?
The following steps outline how to calculate the number of gallons from acre-inches.
- First, multiply the land area in acres by the water depth in inches to find acre-inches (AI). Enter those two measurements in Volume mode above.
- Next, use the conversion factor (CF) of 27,154.285714… US liquid gallons per acre-inch.
- Finally, calculate the number of gallons using the formula G = AI * CF.
- After inserting the values and calculating the result, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
Acre-Inches (AI) = 2
Conversion Factor (CF) = 27,154.285714… US liquid gallons per acre-inch. For 2 acre-inches, the result is approximately 54,308.571429 US liquid gallons.
