Fluid ounce to US gallon Converter (and vice versa)
Created by: tinycalcs.com/en
Number of supported units: 2
Last update: 2026
This converter allows you to convert fluid ounces [Imp.fl.oz.] to US gallons [US.liq.gal.] or US gallons [US.liq.gal.] to fluid ounces [Imp.fl.oz.]. Calculations are performed in both directions. The calculation result and the entered value are displayed with up to 20 decimal places for maximum accuracy.
Convert fluid ounces to US gallons
There are two simple ways to convert fluid ounces [Imp.fl.oz.] to US gallons [US.liq.gal.]. In the first calculation method, the value in fluid ounces [Imp.fl.oz.] is divided by the rounded conversion factor of 133.2279. The second method multiplies the value in fluid ounces [Imp.fl.oz.] by the rounded conversion factor of 0.0075.
- US gallons [US.liq.gal.] ≈ fluid ounces [Imp.fl.oz.] ÷ 133.2279
- US gallons [US.liq.gal.] ≈ fluid ounces [Imp.fl.oz.] * 0.0075
However, rounded conversion values are only suitable for rough conversions, as rounding errors can occur in the calculation result. The most accurate conversion of fluid ounces [Imp.fl.oz.] to US gallons [US.liq.gal.] can be achieved using the following calculation method.
- US gallons [US.liq.gal.] = fluid ounces [Imp.fl.oz.] ÷ 58,674 ÷ 1,032.256 * 454,609
Convert US gallons to fluid ounces
Converting US gallons [US.liq.gal.] to fluid ounces [Imp.fl.oz.] is easy and can be done in two ways. The first method involves multiplication, in which the value in US gallons [US.liq.gal.] is multiplied by the rounded conversion factor of 133.2279. The second variant is a division. Here, the value in US gallons [US.liq.gal.] is divided by the rounded conversion factor of 0.0075.
- Fluid ounces [Imp.fl.oz.] ≈ US gallons [US.liq.gal.] * 133.2279
- Fluid ounces [Imp.fl.oz.] ≈ US gallons [US.liq.gal.] ÷ 0.0075
However, rounded conversion values do not allow for exact calculations because rounding errors can occur in the calculation result. The most accurate conversion of US gallons [US.liq.gal.] to fluid ounces [Imp.fl.oz.] can be achieved using the following calculation method.
- Fluid ounces [Imp.fl.oz.] = US gallons [US.liq.gal.] * 58,674 * 1,032.256 ÷ 454,609
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