When people have the idea to renovate bathrooms, it’s easy to be indecisive to choose a bathtub. Because there are various shapes, sizes, and styles of the bathtub.
According to the style and design, the common sizes include standard bathtubs, corner bathtubs, soaking tubs, etc. Every type has its unique style. I will expand on this in detail below in this comprehensive bathtub size guide.
Knowing the bathtub size is important for us?
Yes, size does matter, and knowing this early can save you much time and effort.
It’s not just about making sure it fits through your bathroom door (although important). It’s about considering how you want to use your tub.
Are you a solo soaker, a parent with kids who love bath time, or someone who sees a bath as an at-home spa experience, what you plan to do with your bathtub will guide the shape and size of your ideal tub.
A tub too large can overwhelm your space and leave your water heater struggling to heat it and a tub too small can make your bathing experience claustrophobic. So, the bathtub size is the same important as the bathtub style.
Bathtub Size Sheet: Common Types and Dimensions
1. Alcove Bathtubs
- Standard Size: 60 inches (L) x 30 inches (W) x 14-16 inches (H)
- Small Size: 54 inches (L) x 30 inches (W) x 15 inches (H)
- Large Size: 72 inches (L) x 36 inches (W) x 20 inches (H)
2. Freestanding Bathtubs
- Compact Size: 55 inches (L) x 27 inches (W) x 15 inches (H)
- Standard Size: 60-67 inches (L) x 30-32 inches (W) x 22-24 inches (H)
- Large Size: 70-72 inches (L) x 32-34 inches (W) x 24 inches (H)
3. Corner Bathtubs
- Medium Size: 60 inches (L) x 60 inches (W) x 21 inches (H)
- Large Size: 72 inches (L) x 72 inches (W) x 20-22 inches (H)
4. Soaking Tubs
- Standard Size: 60 inches (L) x 30 inches (W) x 18-23 inches (H)
- Japanese Soaking Tubs: 55 inches (L) x 55 inches (W) x 25-30 inches (H)
5. Whirlpool and Air Tubs
- Standard Size: 60 inches (L) x 32 inches (W) x 18-22 inches (H)
- Large Size: 72 inches (L) x 42 inches (W) x 20-24 inches (H)
6. Walk-In Tubs
- Standard Size: 52 inches (L) x 30 inches (W) x 40 inches (H)
- Bariatric Size (Wider): 60 inches (L) x 36 inches (W) x 40 inches (H)
7. Clawfoot Tubs
- Small Size: 54 inches (L) x 30 inches (W) x 24 inches (H)
- Standard Size: 60 inches (L) x 30 inches (W) x 25 inches (H)
- Large Size: 72 inches (L) x 36 inches (W) x 26 inches (H)
Notes:
Dimensions are in inches and are represented as length (L) x width (W) x height (H). To get the bathtub size in cm, multiply their inch value by 2.54.
To get the standard bathtub size in feet, multiply their inch value by 0.0833. For bathtub dimensions in mm, multiply their inch value by 25.4.
The height of a bathtub can mean either the overall height of the tub or the soaking depth, which is the internal measurement from the bottom of the tub to the overflow drain.
Some bathtubs may come in non-standard sizes or can be custom-made to fit specific bathroom dimensions. Small bathtub sizes are generally safer if you don’t have enough information to choose.
Always allow for extra space for installation and ensure that your bathroom’s structural support can accommodate the chosen bathtub, especially for heavier materials like cast iron.
For whirlpool and air tubs, additional space may be required for the pump and motor, so consult with a professional for specific installation requirements.
Different Types of Bathtub Sizes: A Soaker’s Guide
Bathtubs are like ice cream, with different flavors and sizes, only instead of chocolate or vanilla, you’re choosing between an alcove, freestanding, or one of the many other types of bathtubs.
Each type comes with its own set of standard sizes and knowing the differences between these tubs can mean the difference between a tub that’s just okay and one that fits like a glove. Let’s dive right into the different types of bathtubs and what you should know about them.
1. Alcove Bathtubs
An alcove bathtub is a type of bathtub that is designed to be installed in a recessed three-wall enclosure. This means that the tub is surrounded by walls on three sides, with the fourth side where one enters the tub.
This design is trendy because it is compact, versatile (often accommodating a shower function), and well-suited for the layout of many standard bathrooms.
Standard sizes for alcove tubs usually start at 60 inches long by 30 inches wide (sometimes 32), with a depth of around 14 to 16 inches. But they can go up to 72 inches long if you want to stretch out m
Finally, alcove tubs are the go-to for shower/tub combos, and they’re often found in apartments or smaller homes where space is a significant consideration.
2. Freestanding Bathtubs
freestanding Bathtubs are a type of bathtub that stands alone without being attached to any walls or fitted into an alcove.
They’re bold, beautiful, and, as the name implies, freestanding. These are freestanding bathtub sizes, including length, width, and depth.
Length: Freestanding tubs usually range from 55 inches to 72 inches (about 140 cm to 183 cm).
Smaller tubs around 55 inches are suitable for compact spaces, while larger ones provide more room for relaxation.
Width: The width can vary between 27 and 32 inches (about 69 cm to 81 cm). More expansive tubs offer more comfort, especially for more prominent individuals or those wanting a more spacious bathing experience.
Depth: The depth of freestanding bathtubs is generally between 15 and 20 inches (about 38 cm to 51 cm). Deeper tubs are ideal for soaking, as they can cover most of the body when filled.
Shape Variations: Unlike standard alcove tubs, freestanding tubs come in various shapes, including oval, rectangular, and even unique custom designs. This means that their dimensions can be quite diverse.
Capacity: The water capacity of freestanding tubs also varies, often ranging from around 40 gallons (151 liters) to over 60 gallons (227 liters), depending on their size and shape.
3. Corner Bathtubs
A corner bathtub is a specific type of bathtub. It is a triangular or angled-shaped bathtub. It is designed to be installed in the bathroom’s corner.
It maximizes the use of bathroom space, especially in smaller or irregularly shaped bathrooms. However, there are some typical dimensions for these triangular or angled-shaped bathtubs:
Length and Width: A corner bathtub’s typical length and width can range from about 48 inches (122 cm) to 72 inches (183 cm) on each side. The size often depends on whether the tub is designed for single or multiple users.
Depth: The depth of corner bathtubs is usually around 18 to 20 inches (46 to 51 cm), but this can vary. Deeper models are available for a more immersive soaking experience.
Wall Sides Length: The sides of the bathtub that adjoin the walls are generally the same length, forming a right-angle triangle. However, some models may have unequal sides to fit specific bathroom designs.
Capacity: The water capacity of corner bathtubs can vary, but they often hold more water than standard bathtubs, significantly larger models, due to their shape and size.
Shape Variations: While the typical corner bathtub is triangular, some models may have more of a curved or sector shape, which can affect the overall dimensions.
4. Soaking Tubs
Soaking tubs are bathtubs explicitly designed for deep, relaxing baths.
They are deeper than standard bathtubs, allowing for more complete immersion in water.
Many models are 14 to 20 inches deep or even more profound.
Pros: Some soaking tubs include features for added comfort, such as built-in seats or lumbar supports, allowing for prolonged relaxation.
Cons: Soaking tubs can take up more space in a bathroom due to their depth and sometimes larger dimensions.
This needs to be considered when planning a bathroom layout.
The size of soaking tubs
Some typical dimensions for soaking tubs are as follows:
Length: Soaking tubs typically range from about 60 inches (152 cm) to 72 inches (183 cm)—some custom or luxury models maybe even longer.
Width: Soaking tubs vary widely, usually between 30 inches (76 cm) and 40 inches (102 cm).
Depth: The critical feature of soaking tubs is their depth, generally greater than standard bathtubs. The depth of soaking tubs often ranges from about 15 inches (38 cm) to over 20 inches (51 cm), allowing for full-body immersion.
Shape and Style: Soaking tubs come in various shapes, including traditional rectangular, oval, circular, and even unique custom shapes. The style and shape can influence the overall dimensions.
5. Whirlpool and Air Tubs
Whirlpool and air tubs are the theme parks of bathtubs, they offer jets, bubbles, and more for a fun and relaxing bathing experience.
Size-wise, they’re similar to alcove and freestanding tubs but they need more space to accommodate the mechanics that power the jets.
So not only do you need enough room for the bathtub but you also have to consider space for the equipment and finance any servicing it might need.
6. Walk-In Tubs
These tubs are mostly for people with mobility issues due to how easy it is to walk into them and have a good bath.
They’re usually taller and have a built-in seat, they also feature anti-slip surfaces and much more, making them as safe as possible for their users.
The sizes of walk-in tubs are comparable to alcove tubs in size and width but they offer more depth for a seated soaking experience.
How Does Bathtub Size Impact Remodel Costs?
When remodeling a bathroom or installing a new bathtub, the size of the tub you choose can have a huge impact on the installation process and the overall cost.
But it’s now only a matter of size, there are several factors you should consider when choosing a bathtub for your space.
1. Spatial Considerations
The size of the bathtub determines to a large extent the scale in your bathroom. A bigger tub may force you to move existing fixtures or even tear down walls for more room. This may require additional costs in construction, plumbing, and finishing work.
A free-standing tub, for instance, might require a new location away from the walls–in which case it would be necessary to reroute plumbing lines.
A big whirlpool tub means not just enough room in the bathroom, but also sufficient space for mechanical parts and maintenance access.
2. Structural Support
Traditional cast-iron bathtubs, often filled with water by a person, can weigh 600 pounds or more. That much weight might overload your existing floor if it isn’t reinforced. Another hidden cost is the need to add additional support to your floor joists.
3. Plumbing Upgrades
A bathtub’s size affects your plumbing too. Whirlpools and soaking tubs hold more water than standard bathtubs. A larger tub may require a bigger or more powerful water heater.
Furthermore, there may be different drainage requirements in larger tubs because of the increased volume of water.
How to Measure What Size Bathtub You Need
Now that you know the different bathtub sizes and the different types of bathtubs available, before you dive into any purchase, you need to measure your space to know what tub is just right for you. Here’s how to do that.
1: Measure the room
Grab a tape measure, a notepad, and maybe a helping hand, and get ready to get accurate measurements of your bathroom.
Measure the entire length and width of the space and note your numbers. This gives you a bird’s eye view of the space you’re working with.
2: Check the fixtures
Look at the current fixtures in your bathroom like the toilet, sink, and vanity. Make sure you have enough clearance around these fixtures for comfortable use.
Experts say you should have at least 30 inches of clearance in front of your toilet and 21 inches for a sink.
3: Assess the tub area
Check where the tub will go, if you’re replacing an old tub, measure the dimensions of the existing bathtub to use as a starting point.
If you’re installing a completely new tub, measure out the area you plan to use to see if it aligns with your tub goals.
4: Consider Doorways and Hallways
Many people often overlook this part but you need to know if your tub can actually get into the bathroom.
Measure the width of your doorways, hallways, and any other points of entry in your home so you can be sure the tub will fit.
5: Finish up
Check where your current plumbing is located, will the placement of the drain and water supply affect your tub options? Measure the distance from the wall to the center of the drain to have an accurate idea of your options.
Also think about tiles, trims, or a tub surround. These elements can eat into the space around your tub so you’ll need to factor them into your measurements.
Make sure you have enough room to install these elements without cramping your style or your ability to clean your tub comfortably.
Frequently Asked Questions (FAQs)
1. Can I replace my old bathtub with any style of new bathtub?
Even if you have a particular idea of style in mind, the new tub must still fit into existing space and work with current plumbing configurations unless renovations are planned.
It must be compatible with the location of your drain and faucets or be ready to recut the plumbing.
2. How much clearance should I leave around a new bathtub?
You should provide a minimum of 4 to 6 inches of clearance around the bathtub for cleaning and maintenance.
There’s more: In general, building codes require a certain amount of clear area in front of fixtures like toilets usually about 21 to 30 inches. Factor this into your layout plans as well.
3. Will I need to reinforce my floor for a new bathtub?
It’s based on the weight of your new bathtub (when filled with water) and what your existing floor can hold.
Bathtubs that are large or heavy, like those crafted of cast iron with whirlpool features, may need additional floor support. Check with a structural engineer or professional installer to see if reinforcement is required.
For purchases and more inquiries, check our website and you’ll find everything you need. For our bathtub sizes and prices, check out our list of best bathtubs for 2023.
