How many fluid ounces are in one gallon?

How many fluid ounces are in one gallon?

• A. 64
• B. 128
• C. 256
• D. 100

Answer: (B)

Think about how measurements are broken down in the US system. A gallon equals 4 quarts, and each quart has 2 pints. Each pint contains 16 fluid ounces. So multiply 4 quarts by 2 pints per quart by 16 fluid ounces per pint: 4 × 2 × 16 = 128. Therefore, one gallon has 128 fluid ounces. The other options don’t match the standard conversions (64 would be half a gallon, 256 would be two gallons, and 100 isn’t a valid gallon-to-ounces conversion).

Think about how measurements are broken down in the US system. A gallon equals 4 quarts, and each quart has 2 pints. Each pint contains 16 fluid ounces. So multiply 4 quarts by 2 pints per quart by 16 fluid ounces per pint: 4 × 2 × 16 = 128. Therefore, one gallon has 128 fluid ounces. The other options don’t match the standard conversions (64 would be half a gallon, 256 would be two gallons, and 100 isn’t a valid gallon-to-ounces conversion).