Acre-feet to US gallons
Type a value in acre-feet to see it in US gallons straight away, or type in the second box to convert back.
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How to use it
- Type the value in the acre-feet box.
- Read the result in US gallons as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
gal (US) = ac·ft × 325,851.4286
Multiply the value in acre-feet by 325,851.4286 to get US gallons.
Example
To convert 25 ac·ft to US gallons: 25 × 325,851.4286 = 8,146,290 gal (US).
Conversion table
| Acre-feet (ac·ft) | US gallons (gal (US)) |
|---|---|
| 1 | 325,851 |
| 2 | 651,703 |
| 3 | 977,554 |
| 5 | 1,629,260 |
| 10 | 3,258,510 |
| 20 | 6,517,030 |
| 25 | 8,146,290 |
| 50 | 16,292,600 |
| 100 | 32,585,100 |
| 250 | 81,462,900 |
| 500 | 162,926,000 |
| 1,000 | 325,851,000 |
About the units
- Acre-foot
- The acre-foot is the water that covers one acre to a depth of one foot: 43560 cubic feet or 1233.48183754752 cubic meters.
- US gallon
- The US liquid gallon is defined as 231 cubic inches, exactly 3.785411784 liters.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many US gallons are in one acre-foot?
1 ac·ft = 325,851 gal (US) exactly.
How do I convert acre-feet to US gallons?
Use gal (US) = ac·ft × 325,851.4286. For example, 25 ac·ft = 8,146,290 gal (US).
How many acre-feet are in one US gallon?
1 gal (US) = 0.00000306888 ac·ft.
What is the difference between a US gallon and an imperial gallon?
A US gallon is 3.785411784 liters and the imperial gallon used in the UK is 4.54609 liters, about 20% larger. Check where a figure comes from before converting, since US sources mean the US gallon.
How many milliliters are in a cup?
The US customary cup used in recipes is 236.5882365 mL and the metric cup is 250 mL. US nutrition labels round the cup to 240 mL, so the figure differs slightly between sources.