Volume
gal (US)toac·in
Convert US gallons (gal (US)) to acre-inches (ac·in).
Factor1 gal (US) = 3.68266e-5 ac·in
Converter
gal (US)
Accepts numbers or expressions, e.g. 150 + 14.7
Result
ac·in
Rendered to 6 significant figures.
Formula
Formula
ac·in = gal (US) × 3.68266e-5
Multiply any value in US gallons by 3.68266e-5 to obtain the value in acre-inches.
Worked example
Convert 27000 gal (US) to ac·in.
- 01Start with 27000 gal (US).
- 02Multiply by the conversion factor: 27000 × 3.68266e-5 = 0.994318 ac·in.
Result27000 gal (US) = 0.994318 ac·in
Conversion table
| gal (US) | ac·in |
|---|---|
| 1 | 3.6827e-5 |
| 2 | 7.3653e-5 |
| 5 | 0.00018413 |
| 10 | 0.00036827 |
| 20 | 0.00073653 |
| 50 | 0.0018413 |
| 100 | 0.0036827 |
| 200 | 0.0073653 |
| 500 | 0.018413 |
| 1000 | 0.036827 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from gal (US) to ac·in?
1 gal (US) equals 3.68266e-5 ac·in. To convert, multiply the value in US gallons by 3.68266e-5.
How do I convert 1 gal (US) to ac·in?
1 gal (US) = 3.68266e-5 ac·in. For any value, multiply by 3.68266e-5.
How do I convert ac·in back to gal (US)?
Divide by the same factor — or equivalently, multiply by 27154.29. So 1 ac·in = 27154.3 gal (US).
When would I need to convert US gallon to acre-inch?
Volume conversions are used for tank sizing, batch calculations, and bridging between vendor specs (gallons, barrels, ft³) and process documentation (m³, litres).
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).