Sumwise

US gallons to US fluid ounces

US fluid ounces = US gallons × 128

Reverse: US fluid ounces to US gallons

Ad · pair-top

How to convert US gallons to US fluid ounces

One US gallon is 128 US fluid ounces, so multiply the number of US gallons by 128. For example, 20 US gallons is 20 × 128 = 2,560 US fluid ounces. To go back, divide by the same number, or multiply by 0.0078125.

Quick estimate

Multiplying by about 100 gets within 21.9% of the exact answer, which is enough to check that a result makes sense.

Where it comes up

Volume conversions come up in recipes, fuel economy, drink and bottle sizes, garden and pool water, and engine sizes.

US gallonsUS fluid ounces
1 gal128 floz
2 gal256 floz
3 gal384 floz
4 gal512 floz
5 gal640 floz
6 gal768 floz
7 gal896 floz
8 gal1,024 floz
9 gal1,152 floz
10 gal1,280 floz
11 gal1,408 floz
12 gal1,536 floz
13 gal1,664 floz
14 gal1,792 floz
15 gal1,920 floz
16 gal2,048 floz
17 gal2,176 floz
18 gal2,304 floz
19 gal2,432 floz
20 gal2,560 floz
25 gal3,200 floz
30 gal3,840 floz
40 gal5,120 floz
50 gal6,400 floz
60 gal7,680 floz
70 gal8,960 floz
75 gal9,600 floz
80 gal10,240 floz
90 gal11,520 floz
100 gal12,800 floz
120 gal15,360 floz
150 gal19,200 floz
200 gal25,600 floz
250 gal32,000 floz
300 gal38,400 floz
400 gal51,200 floz
500 gal64,000 floz
750 gal96,000 floz
1,000 gal128,000 floz
1,500 gal192,000 floz
2,000 gal256,000 floz
5,000 gal640,000 floz
10,000 gal1,280,000 floz

Questions

How many US fluid ounces are in a US gallon?

128 US fluid ounces.

How do I convert US gallons to US fluid ounces in a spreadsheet?

Put the value in A1 and type =A1*128, then fill the formula down the column.

Are the values in the table exact?

They are calculated from the exact definitions of the units and rounded only for display. Open any row for the full working.