Q:

# How many gallons of water does a bathtub hold?

A:

The standard bathtub, which measures 60 inches long by 30 inches wide, holds approximately 35 to 50 gallons of water. Larger units, such as soaking tubs or freestanding tubs, hold approximately 60 to 80 gallons of water. Spa or corner tubs typically hold 70 to 120 gallons of water.

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By comparison, a 10-minute shower consumes approximately 25 to 50 gallons of water or more, depending on the type of showerhead used. The maximum volume of a bathtub is calculated by multiplying the inner width, length and depth in inches and then dividing the product by 1,728 to convert it into cubic feet. The tub's volume, in gallons, is then determined by multiplying the total number of cubic feet by 7.5, which is the number of gallons in 1 cubic foot.

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## Related Questions

• A:

Depending on the type of showerhead, a 10-minute shower can use up to 50 gallons of water. Installing a low-flow showerhead cuts the amount of water used to about 25 gallons per 10-minute shower.

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To figure out how many gallons of water a pool holds, calculate the surface area and multiply by the depth of the pool to obtain a figure for the cubic volume. Multiply the cubic volume by 7.5 for a square or rectangular pool, 7 for a kidney-shaped pool, or 5.9 for a round or oval-shaped pool.

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Water meters are read in gallons, because the home's storage tank capacity is also measured in gallons in the United States. Capacity or volume is measured in gallons, in accordance with the U.S. customary system.