How many gallons are in 1 cubic foot of water?

How many gallons are in 1 cubic foot of water?

• A. 6.23 gallons per cubic foot
• B. 7.48 gallons per cubic foot
• C. 8.00 gallons per cubic foot
• D. 7.00 gallons per cubic foot

Answer: (B)

Understanding how volume converts between cubic feet and gallons is essential for sewer and water calculations. A cubic foot is 12 inches by 12 inches by 12 inches, which equals 1,728 cubic inches. A US gallon is defined as 231 cubic inches, so 1 cubic foot equals 1,728 divided by 231, which is about 7.4805 gallons. Rounded, that gives 7.48 gallons per cubic foot. The other options don’t match this standard conversion, which is why 7.48 is the correct figure for US gallons. If you were using imperial gallons, the factor would be different (about 6.23 imperial gallons per cubic foot), but for US practice the 7.48 value is used.

Understanding how volume converts between cubic feet and gallons is essential for sewer and water calculations. A cubic foot is 12 inches by 12 inches by 12 inches, which equals 1,728 cubic inches. A US gallon is defined as 231 cubic inches, so 1 cubic foot equals 1,728 divided by 231, which is about 7.4805 gallons. Rounded, that gives 7.48 gallons per cubic foot. The other options don’t match this standard conversion, which is why 7.48 is the correct figure for US gallons. If you were using imperial gallons, the factor would be different (about 6.23 imperial gallons per cubic foot), but for US practice the 7.48 value is used.