**One gallon is equal to 128 fluid ounces, so 5 gallons equals 640 ounces. Keep in mind that different liquids may have different weights and therefore a different number of ounces. For example, 1 gallon of water equals 8.34 pounds and there are 133.56 ounces in it.**

# How Many Ounces In 5 Gallons

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One gallon is equal to 128 fluid ounces, so 5 gallons equals 640 ounces. Keep in mind that different liquids may have different weights and therefore a different number of ounces. For example, 1 gallon of water equals 8.34 pounds and there are 133.56 ounces in it.