# How Many Fluid Ounces in a Gallon?

Volume can be measured by several units including ounces and gallons

## Answer: 1 gallon has 128 fluid ounces.

**Explanation:**

Both fluid ounces and gallons are used to measure capacity belonging to the US standard system of measurements.

To perform calculations amongst units you can use the metric calculator.

If you want to express capacity from gallon to fluid ounces, you need to multiply it by a factor of 128.