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knowing your warm tub"s capacity can help you estimate the quantity of money you"ll need to spend on energy to keep the bathtub warm for guests. In addition, the capacity likewise tells you the quantity of chemicals you should put in the bathtub to store it clean. The easiest method to number your warm tub"s volume is by fill rate, yet you can also estimate the volume utilizing the dimensions of the warm tub.

You are watching: How many gallons is my hot tub


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Step 1

usage the avoid watch come time exactly how long that takes to to fill your warm tub. If more than one minute, multiply the number of minutes by 60 and also then include the number of seconds to convert to seconds. Because that example, if the takes 28 minute 30 seconds, multiply 28 by 60 to acquire 1,680 and also then add 30 to obtain 1,710 seconds. Leaving the water running.

Step 2

Time just how long it takes to to fill a gallon that water native the very same source. This is the flow rate. If an ext than one minute, main point the variety of minutes by 60 and then include the variety of seconds to convert to seconds.

Step 3

Divide the time it bring away to to fill your warm tube in secs by the moment it takes to fill a gallon in seconds. Because that example, if the takes 1,710 second to fill her hot bath tub and 12 seconds to fill a gallon, divide 1,710 through 12 to uncover your hot bathtub has a volume of 142.5 gallons.


Dimensions Method

Step 1

Use the tape measure up to measure the dimensions of the hot bathtub in inches. If you have actually a round warm tub, measure up the diameter, or distance across the pool through the center, and the depth. If you have a rectangular hot tub, measure up the length, width and also depth.

Step 2

Multiply length by width by depth for rectangular tubs or main point diameter by diameter by depth because that round hot tubs. For example, if you have actually a round warm tube the measured 60 inches across and 48 inches deep, multiply 60 through 60 through 48 to acquire 172,800.

Step 3

Divide the result by 1,728. In the example, division 172,800 by 1,728 to acquire 100.

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Step 4

Multiply the an outcome by 2.4 if her hot bath tub has seating inside or 4.8 if it has actually no seating inside to find the variety of gallons in the warm tub. Perfect the example, if the hot tub has no seating inside, multiply 4.8 through 100 to find the hot tub capacity amounts to 480 gallons.


Mark Kennan is a writer based in the Kansas City area, specializing in personal finance and business topics. He has been writing due to the fact that 2009 and also has been published by "Quicken," "TurboTax," and also "The Motley Fool."