How Much Water Does a 6-Person Hot Tub Hold?

How much water does each hot tub size hold? The truth is, every make or model will differ, even if they technically are all the same size. This has to do with the shape and features of each hot tub and how the water is displaced. For example, when looking at a 6-person hot tub, it can hold anywhere from 320 to 475 gallons of water. This is quite the range but shows us that hot tub sizes are surely not one size fits all. Here’s everything you need to know about determining how many gallons of water are in your specific hot tub model.

Why It’s Important To Know How Many Gallons Are In A Hot Tub

It’s important to know how many gallons of water are in a hot tub for many different reasons, including chemicals, cleaning, costs, and more. When looking at a 6-person hot tub’s water amount, 320 to 475 gallons might seem like a lot of water that will be adding to your electrical bill each month. But really, a hot tub’s water only accounts for 1% of your household’s water usage, or less than 3 gallons a day. 

Although the term 6-person hot tub indicates that there is a standard size, there is actually quite a range in how large the spa will be and how many gallons of water it will hold. For example, is the shape of the hot tub rectangular or more square? What do the seats look like? These are just a few factors that will affect the water quantity of your hot tub, as they can either add to or take away from the overall volume of water. And if you’re filling your hot tub for the first time but aren’t sure what your specific model can hold, then we suggest filling it until it’s at the recommended safety line. This line is there to help you fill your hot tub to the right level without the possibility of it overflowing when people enter, especially if it is 6 individuals sitting in it at once. However, with this said, it’s still a good idea to figure out for sure how many gallons are in your spa so that you know what the ongoing costs for things like chemicals, cleaning agents, etc., will be. Here’s how you can find the exact number of gallons in your hot tub.

Calculating How Many Gallons Are in your 6-Person Hot Tub:

Knowing the specifics of your hot tub, like how much water is in it, will help with ongoing costs and how much you can expect to spend moving forward. It will also allow you to determine how much of a specific chemical it will need so that you can maintain the proper pH levels. When looking at the pH levels of your hot tub’s water, it will need to be between a 7.2 – 7.8 pH reading. The amount of water in your hot tub also determines its overall weight, which is good to know for safety and security reasons. 
The first option to find how many gallons are in your specific make or model is to contact the manufacturer or look through your owner’s manual to see if that information is there. If you’re looking for a fun way to determine the water content of your hot tub, then there’s a little equation you can follow. To conduct this experiment, you will need to have a stopwatch, a gallon jug, and of course, a hose. Your objective is to time how long it takes to fill your hot tub with water from your hose and then use the gallon jug to determine the specifics. Here’s what you’ll need to do.
Start out by filling your hot tub with water while timing it. You will then take the amount in minutes and convert it to seconds. Then, you’ll start putting water into your empty 1-gallon jug until it’s full. From here, you can divide the total time it took to fill your hot tub by how long it took to fill the jug in seconds. This answer will give you the approximate gallons of water in your specific hot tub model. 

It’s always a good idea to know these specifics when owning a hot tub. To find out how to choose the right one for your home, download our free hot tub buyer’s guide.

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