US Gallons to US Fluid Ounces Converter
Convert US gallons (gal) to US fluid ounces (fl oz), with the formula, a conversion table and exact factors.
Change the values and press Calculate to work out your own figures.
Enter a volume, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.
Show the working
- 1 gal = 128 fl oz
- 1 × 128 = 128 fl oz
How to convert us gallons to us fluid ounces
1 gal = 128 fl oz, so multiply by 128 to go from US gallons to US fluid ounces. Going the other way, 1 fl oz = 0.0078125 gal.
fl oz = gal × 128 gal = fl oz × 0.0078125
Worked example:
1 gal = 128 fl oz 5 × 128 = 640 fl oz
US Gallons to us fluid ounces table
| US Gallons | US Fluid Ounces |
|---|---|
| 1 gal | 128 fl oz |
| 2 gal | 256 fl oz |
| 3 gal | 384 fl oz |
| 4 gal | 512 fl oz |
| 5 gal | 640 fl oz |
| 6 gal | 768 fl oz |
| 7 gal | 896 fl oz |
| 8 gal | 1,024 fl oz |
| 9 gal | 1,152 fl oz |
| 10 gal | 1,280 fl oz |
| 15 gal | 1,920 fl oz |
| 20 gal | 2,560 fl oz |
| 25 gal | 3,200 fl oz |
| 30 gal | 3,840 fl oz |
| 40 gal | 5,120 fl oz |
| 50 gal | 6,400 fl oz |
| 75 gal | 9,600 fl oz |
| 100 gal | 12,800 fl oz |
| 250 gal | 32,000 fl oz |
| 500 gal | 64,000 fl oz |
| 1000 gal | 128,000 fl oz |
About the units
- US Gallons (gal)
- US gallons, a US customary unit. Definition: NIST Handbook 44 Appendix C (US customary units; US gallon = 231 in³).
- US Fluid Ounces (fl oz)
- US fluid ounces, a US customary unit. Definition: NIST Handbook 44 Appendix C (US customary units; US gallon = 231 in³).
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