Different Types of Bathtubs and How To Measure Bathtub Size for a Perfect Fit

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When it comes time to replace your bathtub, one of the most important decisions you’ll make is what size bathtub to choose. bathtubs come in all shapes and sizes, and it’s important to select the right one for your needs. Here’s how to measure bathtub size.

In this blog post, we will discuss the different types of bathtubs and their standard dimensions. We’ll also show you how to measure bathtub size, both inside and outside, so that you can find the perfect replacement.

So, whether you’re looking for a new bathtub or just want to ensure you’re getting the right size, read on for all the information you need!

The Typical Size For Bathtubs

WOODBRIDGE BTA1514-C-Drain &O Bathtub, Chrome

Typically standard dimensions will give you a decent estimate of the bathtub’s size. However, they tend to fluctuate depending on the design and type of bathtub.

Below is a list of different types of bathtubs and their standard dimensions.


Corner Bathtub60 inches 60 inches22 inches
Alcove Bathtub 48 to 72 inches    30 to 36 inches15 to 20 inches
Drop-in Bathtub 45 to 72 inches 30 to 32 inches14 to 20 inches
Whirlpool Bathtub60 inches32 to 36 inches18 to 23-1/4 inches
Freestanding Bathtub55 to 72 inches27 to 32 inches15 to 20 inches
Walk-In Bathtubs30 inches50 to 60 inches36 to 42 inches

Types Of Bathtubs And Their Standard Dimensions

WOODBRIDGE BTA1514-C-Drain &O Bathtub, Chrome

Let’s make one thing clear: there is no such thing as a typical bathtub. There are no standards for tubs, and they are produced in a variety of shapes, forms, and sizes.

We can’t provide you with a list of regular shapes, but we can point you in the right direction.

Let’s take a look at the different types of baths.

Corner Bathtubs

Atlantis Whirlpools 6060S Sublime 60 x 60 Corner Soaking Bathtub

Corner Bathtubs are tubs that are placed in the corners of the bathroom. They are large enough to offer you all of the comforts you are looking for. We recommend these tubs for those who prefer a long hot soak rather than a quick shower.

The corner bathtub is ideal for large open bathrooms due to the amount of space they take up.

  • Length 60 inches
  • Width 60 inches
  • Height 22 inches

Alcove Bathtub

Swiss Madison Well Made Forever SM-AB571 Claire 60" x 32" Left-Hand Drain Drain Alcove Tub with Corner Apron Variation (Right-Hand Drain)

In most bathrooms, the alcove bathtub is placed in a small enclosure with three walls surrounding it. For narrow bathrooms, the tub will usually be placed between the two longer walls of the room, with the back wall shutting off the tub forming an alcove.

The alcove is great because you can attach a shower to it using a shower curtain to create an enclosure.

Small Alcove Bathtub Size

  • Length 48 to 54 inches
  • Width 30 inches
  • Height 15 inches

Medium (Standard) Alcove Bathtub Size

  • Length 60 to 66 inches
  • Width 32 inches
  • Height 18 inches

Longer Alcove Bathtub Size

  • Length 66 to 72 inches
  • Width 36 inches
  • Height 20 inches

Drop-in Bathtub

Swiss Madison Well Made Forever SM-DB569 Voltaire 60"x30" Acrylic Drop-In Bathtub

The drop-in tub, also known as a frameless tub, is a type of bathtub built to slot into an existing frame finished with either tile or any other material that you like. Typically a structure is built around the tub, so these tubs do not come with a polished finish on the outside from the factory. This design is most often seen in luxury whirlpool baths or huge two-person tubs.

Generally, drop-in tubs are fitted into alcoves in medium-sized bathrooms, with bigger bathrooms. The bathtub can be placed in the corner of the bathroom, revealing 2 sides. Alternatively, if space allows, you can have the bathtub as the centerpiece with all sides showing.

You will have around 12 inches of space around the tub if you are going to build a deck.

  • Length 45 to 72 inches
  • Width 30 to 32 inches
  • Height 14 to 20 inches

Whirlpool Bathtub

Meditub 3060WILWD 30x60 Left Drain White Whirlpool & Air Jetted Walk-In Bathtub

Whirlpool bathtubs are becoming increasingly popular and are now being made in alcove bathtub sizes allowing these tubs to be fitted in medium-sized bathrooms.

With so many aftermarkets jetted mechanisms available for most standard tubs, from drop-in and walk-in tubs, it is no surprise that companies are offering affordable jetted bathtubs in a variety of shapes and sizes.

Originally whirlpool bathtubs were considered to be much larger, requiring a lot of space, but that is not the case anymore.

  • Length 60 inches
  • Width 32 inches to 36 inches
  • Height 18 inches to 23 1/4 inches

Freestanding Bathtub

WOODBRIDGE B0001-BG-Drain &O Bathtub, 67", Brushed Gold

Freestanding tubs typically sit in the center of the bathroom. Depending on the material they are constructed with, weight can be an issue. However, they are very stylish and ooze luxury, often the centerpiece of the bathroom.

Freestanding tubs take up a large amount of space in the bathroom, as well as the added extra weight, requiring you to provide extra floor support. Generally not suitable for small bathrooms as space around the tub is required.

Provided you have ample space, there is no need for measurements as you can place the bathtub in the most suitable position.

There are several designs and materials to choose from copper at the higher end to acrylic, suiting a wide range of budgets.

  • Length 55 to 72 inches (about 4 1/2 to 6 feet)
  • Width 27 to 32 inches
  • Height 15 to 20 inches

Walk-In Bathtubs

Empava EMPV-WIT373 52.5" Acrylic Freestanding Walk-in Bathtub

Walk-in bathtubs are the perfect alternative for seniors or people with mobility issues. Typically the walk-in tub has a door that will open to let the user go in and out without having to climb over the edge reducing the risk of any accidents. The tub also comes fitted with strategically placed grips and handrails for extra safety.

These tubs generally tend to be quite heavy and require a professional to install them.

  • Length 30 inches
  • Width 50 to 60 inches
  • Height 36 to 42 inches

What You Will Need To Take The Measurements

There are many ways to measure an item, but we recommend a flexible measuring tape because of the curves in a bathtub. Have a pen or pencil with a notebook ready. Drawing a rough sketch of the bathtub before you start and marking the measurements on this sketch will help when you refer back to the dimensions.

Measuring Your Bathroom Space

It is important to remember that these measurements are simply guidelines; however, knowing the dimensions of the area where the tub will be placed is essential.

When taking measurements, whether they be the width or the length of the bathtub, allow a couple of inches on all sides, as you will need this extra space for the outer lip and for any parts that may need to be installed in the wall.

Make sure to double-check all measurements before purchasing your bathtub to avoid any issues. If you are not sure, then it is best to ask a local plumber or contact the seller to get some help.

FAQ’s Frequently Asked Questions

How much water does my bathtub hold?

If you have a standard-sized bathtub, then it will hold approx 80 gallons of water. If you are replacing your bathtub, then your local supplier will be able to tell you the volume.

How long will It take to fill my bathtub?

It will depend on the pressure of the water, but generally, it can take around 12 to 15 minutes to fill up the standard bathtub of 80 gallons.

How can I tell if my bathtub is steel or fiberglass?

You can use a magnet, and if it sticks, then it is either steel or cast iron. They also tend to be cooler to the touch. Fiberglass bathtubs are warmer to the touch and look more like plastic.

How big is a 2-person bathtub?

A 2-person bathtub is wider and deeper. There are different styles and sizes available and ranging from 67 to 74 inches in length and 33 to 40 inches in height. Different manufacturers have their specific dimensions so when deciding on a bathtub, check with individual companies.

What is the perfect depth for a soaking tub?

Of course, there is perfect depth as there are many factors involved, such as the height, weight, and size of the person using the tub.

However, most bathtubs will give you complete immersion at around 15 inches in depth. If you do require a deeper soaking experience, then Japanese tubs may be the answer, with a depth of 22 inches.

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