20 Ounces to Gallons [liquid]

20 fl oz = 0.15625 gal

Calculation: gal = 20 fl oz × 0.0078125 = 0.15625 gal

How much is 20 fl oz?

591 mL (20 fl oz) is about a standard wine bottle (750 mL / 25.4 fl oz).

What does 20 fl oz look like?

Illustration of a wine bottle — 591 mL (20 fl oz) is about a standard wine bottle (750 mL / 25.4 fl oz).

20 fl oz on the gallon [liquid] scale

20 fl oz = 0.1563 gal

How to Convert Ounce to Gallon [liquid]

1 ounce = 0.0078125 gallons [liquid]

Gallon [liquid] = Ounce × 0.0078125

Example: 20 fl oz × 0.0078125 = 532 gal

Reverse Conversion

To convert gallons [liquid] back to ounces:

Remember, 1 gallon [liquid] equals 128 ounces.
To convert 532 gal to fl oz, multiply 532 x 128, resulting in 20 fl oz.

20 fl oz is also equal to:

Frequently Asked Questions

How much is 20 ounces in gallons [liquid]?

20 ounces equals 0.15625 gallons [liquid]. This is calculated by multiplying 20 by the conversion factor 0.0078125.

What does 20 ounces look like in gallons [liquid]?

20 ounces (0.15625 gallons [liquid]) is a pint to a quart — a large glass or a small bottle.

How do you calculate 20 ounces to gallons [liquid]?

Multiply 20 by the conversion factor 0.0078125. The calculation is 20 × 0.0078125 = 0.15625 gallons [liquid]. This factor is defined by international measurement standards.

20 ounces = 0.15625 gallons [liquid] — conversion chart

Nearby Conversions

For general conversions between ounces and gallons [liquid], see the ounces to gallons [liquid] converter.

Also convert Ounces to:

Conversion factors verified against NIST, BIPM, ISO 80000-3 1 US gallon = 3.785411784 L (exact, US customary). Last reviewed: March 2026

By Adilson Fernandes

Reviewed by Tiago Fernandes

All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.