Walk-In Tub Dimension: Sizes of Standard, Deep And Wide Tubs (2022)

When you’re buying any bathtub, knowing the size of the tub is essential – we need to know how much space is needed in the bathroom in order to install it. Knowing what are the dimension of a walk-in tub (width x length x height) is even more important in order to appropriate movement space for our elderly, calculate how much space we’ll leave in the bathroom for a potential wheelchair and, simply put, because choosing the wrong walk-in tub dimensions can result in thousands of dollars in return fees and re-installations.

Do walk-in bathtubs come in different sizes?

Of course. There are several different dimensions of walk-in tubs to choose from and we’ll list 7 most common (and uncommon) ones. One thing everybody is aware of is that a walk-in tub for senior costs, on average, $5,000 to $7,000 with the installation. Choosing the right size of the walk-in bathtub does spare a whole lot of problems down the line.

Walk-In Tub Dimension: Sizes of Standard, Deep And Wide Tubs (1)

Below you’ll see exactly what kind of the walk-in tub dimensions are available. You should check all the sizes, from the small ones to the big double-seat accessible tub dimensions, to see which one fits your bathroom the best. If you haven’t yet measured the space in the bathroom for the walk-in tub placement, now would be the time.

Walk-In Tub Dimensions Vs. Dimensions Of A Standard Tub

Odds are that you have a standard tub or a shower or certain size already installed and you want to upgrade it to a safer walk-in tub. In general, if you look at the dimensions of a standard tub vs. walk-in tub, you’ll find out the following:

  • Width: the same for standard and walk-in tub.
  • Length: walk-in bathtubs are shorter.
  • Height: walk-in tubs for seniors are higher/taller.

A standard bathtub is 60 inches long and about 30-32 inches wide. No one really talks about the height of a standard tub; however, in the case of walk-in bathtubs, height is significant – these special safety tubs can be up to 50 inches tall and can hold up to 100 gallons of water.

Walk-In Tub Dimension: Sizes of Standard, Deep And Wide Tubs (2)

In contrast, the standard walk-in bathtub length is 52 inches while the width is the same as with standard tubs – 30-32 inches. The longest walk-in tub can reach up to 60 inches and some bariatric tubs (for seniors over 300 pounds) can be 40 inches wide. The smallest tubs for small bathrooms can be as little as 36.5” x 33.5” according to WalkInTubGuidewith a height of fewer than 30 inches.

Tip: Pretty much any walk-in bathtub can be installed in place of a traditional tub because the walk-in models are shorter (60” or less).

(Video) Hydro Dimension Walk-in Tubs - Overview

As far as walk-in tub dimensions are concerned, we also have to consider three other measurements:

  1. Walk-in tub seat width and height.
  2. Tub door width.
  3. The height of step-in threshold.

1. Dimensions Of Walk-In Tub Seat

Walk-In Tub Dimension: Sizes of Standard, Deep And Wide Tubs (3)

One of the main features of walk-in tubs is a built-in seat (some tubs come without the built-in seat). This enables elderly people to sit comfortably and enjoy a bath. However, in order for an experience to be truly enjoyable, the seat has to be of appropriate width and height.

The standard size of seat we find in a walk-in bathtub is around 21 inches wide and has a height (distance from the bottom of the tub) of 17 inches.

This seat size accommodates everybody with an exception of very tall or short seniors, or people who weight more than 300 lbs.

For taller or shorter elderly people, the seat height of 17 inches might not be perfect. There is not much wiggle space as far as the seat height is concerned but you’re welcome to contact a tub distribution and talk to them about the walk-in tub seat dimensions. There are changes that you’ll be offered a 2 inch higher or lower (depending if you’re tall or short) seat.

For everybody who is heavier than 300 lbs, chances are the walk-in tub seat will be too narrow. For heavier people, wider bariatric walk-in tubs were designed. Instead of standard 30-32 walk-in tub width, the bariatric models are around 40 inches wide and come with a 30-inch wide bariatric walk-in tub seat. Down below you can check the dimensions of bariatric walk-in bathtubs.

2. Tub Door Width – 3 Options

When choosing the right walk-in bathtub dimensions, another thing to consider is tub door width. Generally, there are three kinds of doors:

(Video) Walk in Tub Electrical & Plumbing

  • Normal standard-sized door (narrow)
  • Bigger and wider wheelchair accessible door (wide)
  • Bariatric walk-in tub doors (in between)

The most common one is the narrow door. However, if you have a wheelchair or are a caregiver to someone who uses a wheelchair for their daily activities, the wider wheelchair accessible door is a better option.

There a middle option as well. Some normal tubs and most bariatric walk-in bathtubs have a specific door that is narrow below and grows wider at the top. Generally, these are the easiest to use to access a walk-in bathtub.

3. Height Of Step-In Threshold

Of course, this is one of the most important walk-in tub dimension. The whole point of walk-in tubs is that a person entering it doesn’t need to awkwardly lift their leg over into the tub – instead, you can just step into the tub (hence the name ‘walk-in tubs’). However, to enter the accessible tub, we have to step over the threshold which is significantly lower.

The size of the walk-in step-in threshold can be roughly divided into 3 categories:

  • Standard height – 3” to 7”
  • High – above 7”
  • Low – below 3”

A general rule of thumb is that the lower the threshold is the better, especially for elderly people.

7 Most Common (And Uncommon) Walk-in Tub Sizes

Because there is such a variety of walk-in tubs with different dimensions, we created a list of 7 most common walk-in tub sizes and some that are uncommon such as cube walk-in tubs and two-seat walk-in tubs. The format used to indicate the dimensions will be: width x length x (possibly) height, all the numbers are in inches.

1. Standard-Sized Tub – 30” x 52” x 38”

As we’ve discussed before, the length of 52 inches and width of 30-32 inches is the golden standard when it comes to walk-in tub dimensions. The standard height the standard tub reaches is 38 inches, which gives you about 30 inches of water depth. What this means is that when you seat in the tub, the water fully covers you up to the neck.

This most popular dimension for a walk-in tub has a seat with a roughly 21 inches width – more than enough for most elderly.

(Video) Deep Walk in Tub for Luxurious Bathing - Bliss Tubs

Here is how a standard-sized tub looks when installed:

Walk-In Tub Dimension: Sizes of Standard, Deep And Wide Tubs (4)

2. Deep Soaking Tub (For Taller People) – 30” x 52” x 46”

For tall people (over 6 ft.), the standard-sized tub might just not be deep enough. The width and length dimensions of the deep soaking tub are the same as with a standard one, the height, however, is increased from 38” to 46”.

These 8 additional inches is the difference between water reaching up to the neck instead to up to the chest. If the depth wouldn’t be increased, taller people would have to leave their shoulders and upper parts of their arms out of the water which isn’t as comfortable as being fully immersed in hot water.

3. Bariatric Tub (For People Over 300 lbs) – 40” x 52” x 38”

For people who are heavier than 300 lbs, the standard walk-in tub dimensions might not be optimal. This is why bariatric tubs were designed that are generally the same as the standard tubs albeit being considerably wider with a wider built-in chair.

While a standard width of a walk-in tub is 30”-32”, the bariatric tub is 40” wide. This also enables the installation of a wider 30” seat that is much more comfortable than a standard-sized one. Here is an example of the extra-wide walk-in tub:

Walk-In Tub Dimension: Sizes of Standard, Deep And Wide Tubs (5)

4. Long Walk-In Tub – 30” x 60” x 38”

Standard tubs are usually 60” long and, in general, walk-in tubs are shorter – 52”. However, if you want a longer accessible bathtub, you’ll easily find one that is 60” long.

These tubs are considered walk-in bathtubs for a large bathroom but given that it is only 6 inches longer, you can install it without much problems in a regular-sized bathroom. Nonetheless, it would be wise to first test such a long walk-in bathtub and check if you feel comfortable sitting in one. What one has to remember is that walk-in tubs are made for seating and don’t have to be as long as regular bathtubs where you can mostly lie down horizontally.

5. Long And Wide Bathtub (For Big Bathrooms) – 36” x 60” x 38”

One of the biggest available dimensions for a walk-in tub is the 36 inches wide and 60 inches long bathtub. Of course, with such a big tub, you’ll have to figure out where to put it. That’s why this is the most viable option for seniors who have big bathrooms.

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What is worth remembering is that long and wide walk-in tub is one of the few accessibility tubs that are bigger than an ordinary bathtub. If you have a regular tub already installed and want to upgrade it to this big version of a walk-in bathtub, you’ll have to think about expending the space that is intended for a bathtub in your bathroom. In turn, this will mean you’ll have less free space to move around the bathroom. In a bigger bathroom this usually isn’t a problem, but with the standard-sized or smaller bathroom having a big walk-in bathtub is a less viable option.

6. Rectangular Walk-In Tub (For Small Bathrooms) – 32” x 38” x 36”

If you don’t have enough space in the bathroom, a smaller walk-in tub could your fit nicely in an empty corner. The smallest walk-in tubs are called ‘rectangular’ or ‘cube’ walk-in bathtubs and it’s easy to see why if you look at the photo below:

Walk-In Tub Dimension: Sizes of Standard, Deep And Wide Tubs (6)

Being only 38” long, the rectangular walk-in tub requires the least amount of bathroom space. What is more, it can perfectly fit into a corner that you just might not be using. The seat is of standard width; however, be sure to test how the small walk-in tub dimensions fit you.

The cube tub is the shortest of all tubs and you might have problems with where to put your feet. Some seniors can experience a similar claustrophobic feeling you might feel on an overbooked plane with little foot space. You can easily take the measurements and plan where in the bathroom to put it but in order to ensure you’ll have a great experience, it is very important to test the rectangular walk-in tub first.

7. Two-Seat Walk-In Tub (For 2 Persons) – 36” x 80” x 38”

What about if two seniors want to take a relaxing bath together? With one of the biggest walk-in tubs – the two-seater – this is no more a problem.

It is not uncommon for a married elderly couple to spend an evening bathtubbing but it does require one of the most uncommon tubs to do it:

Walk-In Tub Dimension: Sizes of Standard, Deep And Wide Tubs (7)

As you can see, the biggest walk-in tub is 20” longer than a standard bathtub, and 4” wider. If you look at different tub sizes, this is one of the biggest tubs of any kind.

When thinking about where to put this model, be aware that it is much bigger than your existing bathtub. You’ll have to find a lot of space to accommodate it but if you want to share your bath with your spouse, we hope you’ll find the space.

(Video) Ellas Bubbles: Choosing The Walk-In Tub That's Best For You

Finding A Place In The Bathroom

To sum it all, it is important to measure the bathroom and figure out a walk-in tub of what dimensions you can safely place in your home. Of course, do consider how you’re going to move around the bathroom as well – especially if you’re choosing a bigger walk-in tub.

Don’t forget that you’ll have to pick a place in the bathroom that is well connected as far as piping and, in case you’ve decided for a sophisticated model, electricity is concerned. It is nigh impossible to install a walk-in tub across the room from the piping, regardless of the dimensions.

If you have an experience about how best to pick the dimensions of walk-in bathtubs, you can share it in the comments below.


What are the dimensions of a standard walk-in tub? ›

The traditional bathtub/shower stall is 60 inches long, and the most popular size of a walk-in tub is 30 inches in height and 52 inches in length. This allows sufficient room to turn and rotate the walk-in tub during installation. This also allows sufficient room for a wheelchair.

What is the length and width of a walk-in tub? ›

Standard Walk-in Tubs

The tubs come with 52 inches length and 32 inches width, and 38 inches height. The seat size for these tubs is usually 21 inches.

What is the standard depth of a tub? ›

The standard tub size for an alcove fixture is 60 inches long, 32 inches wide, and 18 inches deep.

How big a space do you need for a walk-in tub? ›

Typically, a walk-in tub requires a space that's about 60-inches long and 30-inches wide. Exact measurements will vary based upon the tub you select. You also need to factor in the space needed for the door to swing out. If space is limited, some models are available with doors that swing in instead of out.

Will a walk-in tub fit in a regular tub space? ›

Fortunately, most walk-in bathtubs will easily fit into the same area as a standard bathtub, making it easy to swap out your tub. Standard bathtubs measure 60 inches long and between 30 to 32 inches wide. Walk-in tubs are the same width and are usually shorter than the standard at 52 inches.

What is the deepest walk-in tub? ›

With its 46” height and lavish bathing depth, the 3055 is the deepest walk-in tub on the market.
Model 3055.
Actual Size (W x L x H)29.5" x 55" x 46"
Water Capacity with a 200 lb user (Gal.)95
Colors AvailableWhite / Biscuit
Door OpeningRight or Left
5 more rows

What widths do bathtubs come in? ›

Standard tubs usually have external measurements around 60 inches long, 30 inches wide and 14 to 16 inches high. When shopping for a soaking tub, find a tub that measures between 60 inches long and 72 inches long.

What is the best height for a bathtub? ›

Shorter ones are great for tub/showers since you are not climbing over a tall rim on a daily basis. When used as a tub/shower we suggest to keep the height around 20". There is a difference between bathtub height and water height. The bath height is from the bathroom floor to the top of the tub rim - step over height.

What is the most durable material for a bathtub? ›

Cast iron tubs are made by pouring molten iron into a mold of the desired shape, then smoothing it and coating it with a thick layer of enamel. It's probably the most durable tub available, and the finish is resistant to chipping, scratching and denting, as well as most types of chemicals.

How much are walk-in tubs for seniors? ›

The Cost of the Walk-In Tub Itself

The prices of walk-in tubs range from about $2,000 for a basic soaker to as much as $20,000 for a two-person tub offering a spa-like experience.

What is the size of the smallest walk-in tub? ›

The smallest size for a walk-in bathtub is around 36 inches long and 32 inches wide, with the larger sizes going to 60 inches long, 32 inches wide.

What is the average cost of walk-in bathtubs? ›

Walk-in tub costs typically range from $4,000 to $20,000, with a national average of $5,500 for the tub plus professional installation. Walk-in tubs provide convenience and added safety for people who have mobility issues.

How high is the seat in a walk-in tub? ›

Walk-in Tub Comfort

Seats are generally placed at 17 inches high, leaving almost 20 inches of depth to immerse the torso, well within the average torso length of an adult. Many walk-in tub models also have hydrotherapy jets available and other luxury features such as chromotherapy lighting and heated seating.

How long does it take to drain a walk in bathtub? ›

Regular walk-in tubs can take about 6-15 minutes to fully drain, and it's understandable that you wouldn't want to sit exposed for that long! Meanwhile, fast-draining tubs can take only four minutes or less to empty itself.

How wide is a 2 person tub? ›

Common freestanding bathtub sizes for 2 people

A medium sized two person bathtub starts at around 66.9 inches long with a width of 33.5 inches and a height of 22 inches. The largest of the medium sized bathtubs comes in at 70 inches with a width of 35.4 inches and a height of 22.5 inches.

How far should a freestanding tub be from the wall? ›

How far should the distance be between freestanding tub and wall? The distance between your tub and wall should be between 15-18 inches or at least 1 foot.

How long do acrylic tubs last? ›

Acrylic bathtubs are very easy to install and have a lifespan of 10-15 years.

How long should my tub be? ›

Walk-in tubs are usually alcove style and are generally the same average size of 60 inches in length and 30 inches in width. They differ in their height, however, which is normally around 30 inches to provide depth enough for the bather to be comfortably submerged while sitting on the built-in tub bench.

What is a drop in bathtub? ›

Drop-in tubs are the tub shell only. They're fitted inside a framed enclosure that's finished to match bathroom cabinets or tile. An enclosure is a separate item, so budget accordingly. Undermounts are drop-ins destined for floor-level installation. Flooring, such as tile, covers the lip of the tub.

How is bathtub depth measured? ›

How to measure a bath - YouTube

How do you measure the depth of a soaking tub? ›

To measure the soaking depth, measure from the lowest point in your tub (likely the drain) up the basin wall to the bottom of the overflow drain on the side.

What defines a soaking tub? ›

Soaking tubs are designed to submerge your body in, so they come in larger dimensions than the average bathtub. Still, these tubs come in their own wide range of sizes. Some of them might be longer, and some might be even shorter than a typical bathtub, but deeper.

What is the size of a small bathtub? ›

The shortest freestanding tub is a mere 48 inches, or four feet long, and can work well for children's bathrooms or even for adults of average height.


1. WaterTech Elite and Standard Bath Tub Comparison
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2. Los Angeles Walk-in Tub Showroom - Bliss Tubs
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