Convert Fluid Ounces to Gallons

1 fl oz = 0.007812 gal

Conversion Formula

1 fl oz = 0.0078125 gal

Common Fluid Ounce to Gallon Conversions

Fluid Ounces (fl oz)Gallons (gal)
0.50.00390625
10.0078125
20.015625
30.0234375
40.03125
50.0390625
100.078125
150.117187
200.15625
250.195312
500.390625
750.585937
1000.78125
2501.95312
5003.90625
7505.85937
10007.8125
250019.5312
500039.0625
1000078.125

How to Convert Fluid Ounces to Gallons

To convert fluid ounces to gallons, multiply the fluid ounce value by 0.0078125.

For example, 5 fluid ounces is equal to 5 × 0.0078125 = 0.0390625 gallons.

The fluid ounce (fl oz) and the gallon (gal) are both units of volume. Understanding the relationship between these units is helpful for everyday conversions, scientific calculations, and engineering applications.

Frequently Asked Questions

How many Gallons are in 1 Fluid Ounce?

1 Fluid Ounce (fl oz) is equal to 0.0078125 Gallons (gal).

How do I convert Fluid Ounces to Gallons?

To convert Fluid Ounces to Gallons, multiply the value by 0.0078125. For example, 10 fl oz = 0.078125 gal.

How many Fluid Ounces are in 1 Gallon?

1 Gallon (gal) is equal to 128 Fluid Ounces (fl oz).

What is the formula to convert Fluid Ounces to Gallons?

The formula is: Gallons = Fluid Ounces × 0.0078125. This means you multiply the number of Fluid Ounces by 0.0078125 to get the equivalent in Gallons.

How much is 100 Fluid Ounces in Gallons?

100 Fluid Ounces (fl oz) is equal to 0.78125 Gallons (gal). You can use the converter above for any custom value.

Is converting Fluid Ounces to Gallons a common conversion?

Yes, converting between Fluid Ounces and Gallons is a common volume conversion used in everyday life, science, and engineering. Our converter provides instant, accurate results.

Related Conversions

Conversion factors sourced from SI (BIPM) and NIST standards. Reviewed by the MicroCalcTools engineering team.

Last updated: April 2026