Convert US Gallons to US Fluid Ounces
Convert US gallons to US fluid ounces instantly. Type a value below, check the formula and table, then see how the same gal (US) to fl oz (US) conversion looks as a single line in Notes Calculator.
US Gallons to US Fluid Ounces formula
One US gallon is 128 US fluid ounces, so fl oz (US) = gal (US) × 128. For the reverse, multiply US fluid ounces by 0.0078125, or use the US Fluid Ounces to US Gallons converter.
US Gallons to US Fluid Ounces conversion table
| US Gallons (gal (US)) | US Fluid Ounces (fl oz (US)) |
|---|---|
| 1 | 128 |
| 2 | 256 |
| 5 | 640 |
| 10 | 1,280 |
| 20 | 2,560 |
| 25 | 3,200 |
| 50 | 6,400 |
| 100 | 12,800 |
| 250 | 32,000 |
| 500 | 64,000 |
| 1,000 | 128,000 |
US Gallons to US Fluid Ounces in Notes Calculator
Notes Calculator is a notepad that does math. Write 100 galUS to fluid ouncesUS on any line and the answer appears beside it. Change the number and the result follows. The same works with in and as, and with values stored in variables, so a whole estimate can mix US gallons and US fluid ounces without a separate converter.
| Note | Result |
|---|---|
| 100 galUS to fluid ouncesUS | 12,800 flUS |
| 100 galUS in fluid ouncesUS | 12,800 flUS |
| 10 fluid ouncesUS as galUS | 0.08 galUS |
See the unit conversion docs for mixing units in one expression, or open the free web app and try it.
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FAQ
Frequently asked questions
- One US gallon equals 128 US fluid ounces. To convert US gallons to US fluid ounces, multiply by 128; to go back, multiply by 0.0078125.
- Type the value, the unit, and the target unit on one line: 100 galUS to fluid ouncesUS. The keywords to, in, and as all work, and the result updates as you type. You can also keep the value in a variable and convert it later.
- Yes. The converter on this page is free, and Notes Calculator has a free plan for the web, Mac, Windows, Linux, and Android with the same unit conversions built in.
How many US fluid ounces are in one US gallon?
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Convert US gallons to US fluid ounces without leaving your notes.
Notes Calculator is free to start and runs in your browser. Units, currencies, percentages, and variables in one plain-text notepad.
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