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US Gallons to Ounces Converter

Convert US gallons (gal) to ounces (avoirdupois) (oz), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Convert cups and spoons to grams or ounces (or back) for a chosen ingredient, using USDA weights, or enter your own density.

The quantity to convert. Fractions such as 3/4 or 1 1/2 are accepted.
Unit you want. Swap exchanges the two units.
Weight per cup differs by ingredient and by how it is measured (sifted, packed, chopped). Each option names the assumption used; choose Other to enter your own density.
Only used when the ingredient is Other: the weight per volume of your ingredient.
Result
Converted amount
133.526 oz
Density used
1 g/mL (USDA FDC 174158, 1 ml = 1 g)

1 US gallons of water = 133.526 ounces (avoirdupois). Weights for cups and spoons vary with how the ingredient is measured, so treat this as a close estimate.

The same amount in other weight units
UnitAmount
milligrams3,785,410
grams3,785.41
kilograms3.78541
pounds8.3454
Show the working
  1. 1 gal = 3785.411784 mL
  2. × 1 g/mL (USDA FDC 174158, 1 ml = 1 g) = 3785.411784 g
  3. = 133.526471232 oz

How to convert us gallons to ounces

1 gal = 133.526 oz, so multiply by 133.526 to go from US gallons to ounces (avoirdupois). Going the other way, 1 oz = 0.00748915 gal.

oz = gal × 133.526
gal = oz × 0.00748915

Worked example:

5 gal = 18927.05892 mL
× 1 g/mL (USDA FDC 174158, 1 ml = 1 g) = 18927.05892 g
= 667.632356162 oz

US Gallons to ounces table

US GallonsOunces
1 gal133.526 oz
2 gal267.053 oz
3 gal400.579 oz
4 gal534.106 oz
5 gal667.632 oz
6 gal801.159 oz
7 gal934.685 oz
8 gal1,068.21 oz
9 gal1,201.74 oz
10 gal1,335.26 oz
15 gal2,002.9 oz
20 gal2,670.53 oz
25 gal3,338.16 oz
30 gal4,005.79 oz
40 gal5,341.06 oz
50 gal6,676.32 oz
75 gal10,014.5 oz
100 gal13,352.6 oz
250 gal33,381.6 oz
500 gal66,763.2 oz
1000 gal133,526 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).
Ounces (oz)
Ounces (avoirdupois), a US customary unit. Definition: NIST Handbook 44 Appendix C (US customary units; US gallon = 231 in³).

Formula version 0.1.0Reviewed