Convert 1 gallon (US, fluid) to fluid ounce (US fluid)

1 gallon (US, fluid) is equal to 127.99999999999923 fl oz (fluid ounce (US fluid)). To convert from gallon (US, fluid) to fluid ounce (US fluid), multiply by 127.99999999999923 or divide by 0.007812500000000047.

• 1 gallon (US, fluid) × 128 = 128 fl oz
• 1 gallon (US, fluid) ÷ 0.0078125 = 128 fl oz