The Most Common Toilet Sizes – Dimensions & Measurements (2024)

There are several toilet sizes on the market so today we will look at how to pick the right size for your home and what to look for.

The Most Common Toilet Sizes – Dimensions & Measurements (1)

What is the Standard Toilet Size?

The standard toilet size has a depth of 28-30 inches, with a width of 20 inches and a tank height of 27-32 inches. This allows for a rough-in measurement between 10-14 inches.

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How is a Toilet Measured?

To measure for a replacement toilet, grab a tape measure and follow these steps:

1. Tank Height

Measure the tank height by running the tape measure from the floor to the top of the tank lid. You want as close to the very top edge of the tank lid as possible.

2. Toilet Depth

Determine if you have a round or oval bowl. Now run the measure from the front of the seat to the back of the tank. From here you can determine if you want to keep your bowl shape or upgrade to a different shape or size.

3. Rough-in

Rough-in measures the distance between the wall and the center of the waste pipe. To get this measurement, measure from the wall to the middle of the bolt caps of the toilet. If you have four bolt caps, measure to the rear set of bolt caps.

With these measurements, you should now be able to visit any hardware store and buy any toilet you need.

ADA Compliance and Toilets

An ADA-compliant toilet refers to a specific height requirement that caters to those with disabilities. The seat height is the first requirement, with the distance from the seat to the floor needing to be 17 inches or 43 centimeters minimum and 19 inches or 48 centerminters at the maximum. The toilet must also be 60 inches or 152 centimeters wide with a flush lever on the open side. The center of the toilet must be between 16-18 inches from the side wall as well to make the toilet ADA-compliant.

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Common Questions

Are Toilet Seats the Same Size?

No, toilet seats aren’t the same size as there is no set standard for all toilets. Because of this it is important to measure your seat and bowl to determine the appropriate size for your toilet.

10 vs 12 inch Toilet – How to Tell Which One You Need?

In general, unless you have space constraints, you should opt for a 12-inch toilet. This is because 12 inches is considered the standard with many toilet options and it can fit almost every bathroom type. This also makes repairs and maintenance on them quite easy. On the other hand, 10-inch toilets are more specialized for small spaces and are great if you don’t have a great deal of space to work with. However, you trade this with being more expensive to install and maintain.

Are all Elongated Toilet Seats the Same Size?

No, there is no set standard, so all elongated toilet seats will have varying sizes.

How to Choose the Right Size of Toilet for Your Bathroom

So how do you choose the right toilet for your bathroom? Simply follow these steps:

1. Attain the proper measurements

Remember to start with the height of your existing toilet, then discover the depth and finally the rough-in distance. Having these measurements will give you a good understanding about the size of the toilet you are after.

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2. Shop around

Remember that there are numerous places to purchase a toilet or smart toilet so don’t be afraid to shop around to find the right fit for your home. Compare and contrast prices alongside quality and features to ensure that you get the best deal.

3. ADA compliance

Ensure that your toilet is compatible with ADA standards. Future proofing your toilet will ensure that you do not need to replace it in the future in the event that you will require a more ADA compliant setup.

4. Ensure comfortability

Remember that your toilet is a fixture that you will be using for long periods of time and for your health, it needs to be comfortable to sit on. Seeing it in person is key to test out it’s physical aspects and see if it’s compatible with your body.

When it comes to toilet sizes there is no general standard, so you have a good deal of freedom to choose how big you want your toilet. However, just keep in mind that you should have ample space between the toilet and it’s surroundings to ensure that nothing feels too cramped. Additionally, you want to have a decent size for your water closet to ensure that you don’t have to deal with any plumbing issues in the future.

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The Most Common Toilet Sizes – Dimensions & Measurements (2024)

FAQs

The Most Common Toilet Sizes – Dimensions & Measurements? ›

Standard toilet dimensions are typically between 28–30" deep, roughly 20" wide, between 27–32" high, and have a rough-in between 10–14". Now you can find the perfect toilet.

What is the most common toilet size? ›

What is the Standard Toilet Size? The standard toilet size has a depth of 28-30 inches, with a width of 20 inches and a tank height of 27-32 inches. This allows for a rough-in measurement between 10-14 inches.

Are all toilets a standard size? ›

Yes, toilets come in a range of different sizes, that's why it's important to measure your existing toilet seat before you buy. For example, our close coupled toilets come in the following size ranges: Depth—Between 600mm and 720mm. Width—Between 350mm and 500mm.

How do I know what size toilet will fit? ›

The standard rough-in dimensions for toilets is 12 inches. In older homes or small bathrooms, you'll sometimes see rough-in dimensions of 10 inches or 14 inches. Determine your bathroom's rough-in by measuring from the wall behind the toilet to the middle of the bolts on the base of the toilet.

What is the best toilet height for seniors? ›

What toilet height is best for seniors? Seniors and other individuals with mobility problems will have an easier time sitting and standing up from a comfort height toilet, which measures 17 to 19 inches from the ground to the seat.

What is number 1 toilet? ›

Number one is for pee (issue of first nature) and number two is for poo (issue of second nature) associated with human bodily function.

What is the minimum common toilet size? ›

Standard toilet dimensions weigh in around 28-30 inches long or deep, and 20 inches wide with a height of 27-32 inches. You need at least 15 inches from the center of the toilet to the side wall, with at least 24 inches of clear space in front of the toilet.

Are most toilets 3-inch? ›

Toilets and their flush valve systems come in different sizes and shapes. Flappers are available in two sizes: standard two-inch, and large three-inch. Most toilets use the standard two-inch flapper, but large three-inch flappers have become popular recently.

Can you replace an old toilet with any new toilet? ›

It boils down to something much simpler — size. That's right, not every toilet fits in every bathroom. You need to make sure to measure your existing toilet accurately to ensure that the new one will fit in its place.

Are most toilets 2 inch? ›

Most toilets will have a 2-inch drain or a 3-inch drain. Fluidmaster manufactures a standard or universal size of flush valves with flappers and are among the most common flush valves to be used.

What is the recommended toilet width? ›

Standard toilet dimensions are typically between 28–30" deep, roughly 20" wide, between 27–32" high, and have a rough-in between 10–14". Now you can find the perfect toilet.

What are the dimensions of a new toilet? ›

Overall, a standard toilet will be between 27 and 30 inches deep, with a back height of 21 to 31 inches and a width of about 20 inches. An ADA-compliant version needs to have a seat height of 17 to 19 inches.

Is a 16.5 inch toilet too high? ›

Toilet Height Options

The standard height in the United States is around 14.5” from the floor to the top of the toilet bowl. Comfort height or ADA height toilets are a little bit taller and stand about 16.5” tall from the floor to the bowl.

Is a round or elongated toilet better for seniors? ›

Most people find an elongated toilet bowl shape most comfortable for various reasons.

What is a comfort size toilet? ›

Traditional toilets are 15 inches high. Comfort height toilets (or “right height” toilets) have higher seats than traditional toilets, usually between 17 inches and 19 inches. Comfort-height toilets are becoming a popular option for many households.

Is 21 inches too high for a toilet? ›

Toilets taller than 19 inches are optimal for individuals over 6 feet tall who have difficulties with even comfort toilets due to their height or mobility issues. Extra tall versions are typically 20 to 21 inches from floor to bowl yet are compact enough to fit in the standard private bathroom.

Are most toilets 2 inch or 3 inch? ›

Toilets and their flush valve systems come in different sizes and shapes. Flappers are available in two sizes: standard two-inch, and large three-inch. Most toilets use the standard two-inch flapper, but large three-inch flappers have become popular recently.

What is the most common bathroom size? ›

In homes with multiple bedrooms, a full bathroom is a great addition that can serve as a guest bathroom or children's bathroom. The average full bathroom is typically about 40 square feet in size. They include all the fixtures needed in a bathroom such as a toilet, sink, and shower tub combination.

What is the recommended size of a toilet room? ›

In an open bathroom, allow a width of at least 750mm (although 900mm is preferred!) for the toilet to reside in to give the user enough space to sit comfortably without their elbows touching the walls. A length of between 1200 and 1500mm is usually sufficient.

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