Wed, 29 Apr 2026 21:32:48 +0000

How Many Ounces Are in a Gallon? A Complete Guide to US Liquid Measurement Understanding fluid measurements is essential in everyday life—from cooking and gardening to grocery shopping and home improvement projects. One of the most common questions people ask is: How many ounces are in a gallon? Whether you’re measuring liquids for a recipe, calculating fuel needs, or just expanding your knowledge, this guide provides a clear and detailed explanation. ### The Basic Conversion: Gallons to Ounces In the US customary system, a gallon is the standard unit for measuring liquid volume. Here’s the straightforward answer:
One US gallon equals 128 fluid ounces.