How Many Imperial Fluid Ounces in a US Gallon?

Quick Answer
1 US Gallon = 133.228 Imperial Fluid Ounces

1 gal = 133.228 imp fl oz

Formula

imp fl oz = gal × 133.228

Conversion Table

US Gallons (gal)Imperial Fluid Ounces (imp fl oz)
1 gal133.228 imp fl oz
2 gal266.455 imp fl oz
5 gal666.138 imp fl oz
10 gal1,332.28 imp fl oz
20 gal2,664.55 imp fl oz
50 gal6,661.38 imp fl oz
100 gal13,322.8 imp fl oz
500 gal66,613.8 imp fl oz
1,000 gal133,228 imp fl oz

Worked Examples

Convert 5 gal to imp fl oz:
5 gal × 133.228 = 666.138 imp fl oz
Convert 10 gal to imp fl oz:
10 gal × 133.228 = 1,332.28 imp fl oz
Convert 50 gal to imp fl oz:
50 gal × 133.228 = 6,661.38 imp fl oz

FAQ

How many Imperial Fluid Ounces are in 1 US Gallon?
There are 133.228 Imperial Fluid Ounces in 1 US Gallon. Formula: imp fl oz = gal × 133.228.
How to convert US Gallons to Imperial Fluid Ounces?
To convert US Gallons to Imperial Fluid Ounces, multiply the number of US Gallons by 133.228. For example, 10 gal = 1,332.28 imp fl oz.
How many Imperial Fluid Ounces are in 100 US Gallons?
There are 13,322.8 Imperial Fluid Ounces in 100 US Gallons. Calculation: 100 × 133.228 = 13,322.8.