START's reply

===> Convert 80 ounces to gallons

There are 0.62 gallons (US liquid) in 80 ounces (US fluid). One gallon (US liquid) is larger than 80 ounces (US fluid) by 0.37501085 gallons (US liquid).

If the above didn't answer your question, you can select a query below. Among units of volume, I know about three gallons and two ounces.

Which gallons do you mean?

gallon (US liquid)
gallon (UK liquid)
gallon (US dry)

Which ounces do you mean?

ounce (US fluid)
ounce (UK fluid)

Source: START KB