How Big Is A Jacuzzi Tub?

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If you have the chance to install a Jacuzzi in or outside of your home, you’ll want to take it. How big is the average Jacuzzi tub in size and gallons, though? We’ve researched various tub models to get the answer.

The external dimensions of a Jacuzzi vary based on its unique shape. The number of gallons your Jacuzzi tub can hold will depend on how many people it was built for. A two-person Jacuzzi can hold up to 300 gallons of water, while a seven-person hot Jacuzzi can hold up to 675 gallons of water. 

Here we’ll break down both how to estimate a Jacuzzi’s dimensions and what factors may change a hot tub’s size. When you’re armed with this information, you can more readily move the Jacuzzi of your dreams into your yard or home.

An awesome water view with hot tub in summer evening, How Big Is A Jacuzzi Tub?

How Big Is An Average Jacuzzi Tub?

Knowing how large the average Jacuzzi is can be helpful for a couple of reasons. If you haven’t had a Jacuzzi around your home before, you’ll need to know its average dimensions to determine where you can place it. Knowing the average gallonage of a Jacuzzi can also help you determine how much water you’ll need to fill your tub and what effect your tub may have on your water bill.

Jacuzzi tub on wooden patio

You can expect the height, depth, and width of your Jacuzzi to vary based on the number of people the tub claims it can hold. A two-person hot tub, for example, tends to be 78 inches by 78 inches. Jacuzzis made for up to four people, comparatively, are 84 inches by 84 inches. Even larger tubs, meant for six people or more, may even be 94 inches in length or longer.

These dimensions grow even more complicated to estimate if you want a uniquely shaped Jacuzzi or if you have additional accessories you want to be included in your tub. Most hot tubs, luckily, are square, meaning that you can easily fit them onto your deck or in a corner behind your home. Internal accessories, too, tend to impact your hot tub’s gallonage more so than it does the tub’s external dimensions.

Calculating How Many Gallons Your Jacuzzi Tub Can Hold

There are a few different equations you can use to calculate the size of your preferred Jacuzzi tub. These include the dimension calculation method and the timed fill method.

The Dimension Calculation Method

To employ the dimension calculation method, you’ll need to have your preferred jacuzzi on hand. You’ll also need a tape measure. The calculations will also differ depending on whether you have a round Jacuzzi or a square Jacuzzi.

To calculate the gallonage of a round hot tub, you need to:

  1. Measure the diameter and depth of the hot tub
  2. Multiply the diameter by the depth
  3. Divide your result by 1,728, this helps establish the cubic feet of your hot tub
  4. Multiply your result by either 4.8, if your tub doesn’t have seats, or 2.4 if it does have seats

To calculate the gallonage of a square hot tub, you need to:

  1. Measure the length, width, and depth of your Jacuzzi in inches
  2. Multiply the depth of your hot tub by its width
  3. Divide that result by 1,728
  4. Multiply your result from Step 3 by either 4.8, if your tub doesn’t have seats, or 2.4 if it does.

The Timed Fill Method

If you’re looking for a simpler way to calculate a Jacuzzi tub’s size, consider the timed fill method. All you need to do to kick this method off is set a hose inside of your empty hot tub. From there, time how long it takes to fill the hot tub to your preferred depth.

Once you’ve stopped your time, multiply the number of hours it took to fill the Jacuzzi by sixty (60). This will tell you how many minutes it took to fill your tub. Add any extraneous minutes you have to that number. Then, multiply that number by sixty (60) again. Your end result should be the number of seconds it took to fill your Jacuzzi.

Let’s break this down visually, though. Your variables going into this equation are:

  • X = the hours and minutes it took for your tub to fill.
  • Y = the total minutes it took your tub to fill.
  • Z = the total seconds it took your tub to fill.

Your equations, in turn, should look like this:

  1. 60(x) = y.
  2. y + extra minutes.
  3. 60(y + extra minutes) = Z

Your job doesn’t stop here, though. Once you know how many seconds it took to fill your hot tub, you can use that number to determine your gallonage. All you need to do is discover how many seconds it takes your hose to fill a single gallon bucket. You can do this using the same equation listed above.

Once you have the number of seconds it took your hose to fill your Jacuzzi (variable A) and the number of seconds it took your hose to fill up a gallon (variable B), there’s only a little more math to do. Divide A by B, and you have the number of gallons your tub can hold.

In mathematic terms, that equation looks like this: A/B = gallons.

What is the Standard Size of a Jacuzzi Tub?

Close up of wooden hot tub on luxury house exterior

Jacuzzi manufacturers tend to offer their wares in three sizes: small, medium, and large. These hot tubs will vary in size based on their need to accommodate a certain number of people. The average dimensions that you can expect of a square Jacuzzi in all three sizes include:

  • Small hot tubs (two people): 78 inches by 78 inches, 300 gallons of water
  • Medium hot tubs (four people): 84 inches by 84 inches, 400 gallons of water
  • Large hot tubs (six people): 90 inches by 90 inches, 675 gallons of water

Note that you are free to recommend customizations when purchasing your first hot tub. Certain accessories or designs may limit the size of your Jacuzzi, but they may also make your first soak all the more exciting.

What are the Dimensions for a Four-Person Hot Tub?

Four-person hot tubs tend to be 84 inches by 84 inches, so long as they’re square-shaped. These Jacuzzis can contain 400 gallons of water upon their initial use. The gallons that a four-person hot tub contains, however, will vary based on its internal accessories, including any jets or seats.

Can a Hot Tub Fit Through a Gate?

The hardest part of installing a Jacuzzi isn’t picking your preferred model. It isn’t even finding the best place to install your unit. More often than not, it’s fitting your Jacuzzi through your back gate.

Whether or not your hot tub will fit through a gate will depend both on the tub’s size and on the size of your gate. The size of the average back gate tends to cap off at four feet. Most Jacuzzis, however, are six feet wide at their smallest. You can, however, flip an unfilled Jacuzzi on its side to move it into your backyard. Reach out to your friends and get creative with your positioning, and you should be able to move your Jacuzzi with ease.

Can Two People Fit in a Jacuzzi?

There are hot tubs that are made for two people. These hot tubs tend to be smaller than average, coming in at 78 inches by 78 inches. Two-person Jacuzzis tend to contain 300 gallons of water, though you can under- or over-fill your Jacuzzi to your preferred preference.

Note, however, that the question of whether or not two people can fit into a Jacuzzi depends as much on the dimensions of those people as it does the Jacuzzi. If you have a loved one who is especially tall or heavy, consider investing in a four-person hot tub instead of a two-person tub to ensure their comfort.

How Much Room Do You Need for a Jacuzzi Tub?

Woman relaxing in the hot tub

When you’re first looking for a place to install your Jacuzzi, you may be tempted to measure your preferred locations based on your tub’s specific measurements. While it’s a good idea to ensure your tub will fit into one of these locations, you also need to account for entry and exit room. Make sure that you can comfortably walk around your porch or backyard once the installation is complete. Ideally, you’ll want to leave a foot and a half or two feet of space between your hot tub and the nearest wall.

With that in mind, the average amount of room you’ll need to install a Jacuzzi comes in at:

  • Small hot tub: 555 square inches
  • Medium hot tub: 636 square inches
  • Large hot tub: 723 square inches

Installing Your Perfect Jacuzzi

Installing a Jacuzzi in or outside of your home is an exciting process. You’ll have the perfect opportunity, after all, to soak and relax after all of your hard work is done! As you’re researching the Jacuzzis you want to install, however, take each one’s unique quirks in mind. To effectively install your Jacuzzi, you’ll need to account for its gallonage, internal accessories, external dimensions, and surrounding area.

Don’t let the necessities of Jacuzzi installation overwhelm you. We’ve got all of the information you need about Jacuzzi dimensions in this guide. All you have to do is put our research to work.

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