Round vs Elongated Toilet Seat – Detailed Comparisons + Pros & Cons

Bathroom thrones in the United States of America and Canada come in two different sizes; elongated and rounded toilets.

The trend now is towards elongated toilet seat which are roughly two inches longer than a round toilet seat.

To determine what size of toilet is ideal and suitable for your need, you can be easily guided by the American standard dimension.

If your bathroom toilet is an elongated shaped, an elongated toilet seat would the most appropriate to fit perfectly, though technically an elongated toilet seat model would also fit on a round toilet, its elongated end will likely overhang/protrude in a round toilet bowl.

Elongated toilets seats are preferred for a couple of reasons.

Below we highlight its pros and cons and their brief discussions.

Round vs Elongated Toilet Seat Review

Pros and Cons of Elongated Toilet Seat

Pros Cons
More convenient for taller and larger users Relatively More Expensive
Larger flush valve Requires more space in the bathroom
Larger trap-way Not comfortable for children
Easy to Clean Harder to find than rounded toilet seats
Modern and timeless look

Elongated toilet seatsFirst there is an extra space in front and a larger target area. This is more convenient for men particularly if one is taller or larger.

Second, sanitary conditions are improved because of this larger target area.

Thirdly, most people find elongated toilet seat to be more comfortable in a larger and more spacious with minimum furniture bathroom, but in a small bathroom, a round toilet seat can save space.

The elongated toilet bowl measures up to 31 inches while round fixtures max out at 28 inches.

Measuring from the wall to the center of the sewer drain, elongated toilet require a little extra distance of 1 or 2 inches longer though the standard distance is 12 inches.

When it comes to the front, typically one needs at least 21-inches in front to pass the building codes for both the elongated and the round toilet.

For ADA- complaint bathrooms, one needs 48- inches in front to pass. This means you should measure your bathroom first before you head off buying the toilet seat.

Fourthly, although manufacturers push the idea that there is no difference in performance between elongated and rounded toilets, elongated toilet bowls have slightly better pressure than round toilet bowls because they have larger flush valve.

The flush valve is the opening at the bottom of the toilet tank that controls the flow of water to the toilet bowl when the toilet is flushed.

The larger the flush valve, the better the flush performance (a 3-inch flush valve is considered very efficient).

Fifthly elongated toilets have a larger trap-way than rounded toilets. Trap-ways are used to allow waste to easily pass out of the toilet bowl. The larger the trap-way the better (a good trap-way size is 2-1/8 inches).

Finally water consumption is very important (1.6 gallon –per-flush is the universal rule of thumb when it comes to water usage).

Different types of flush technology exist, from pressure-assisted to double-cyclone flushes that have further decreased the amount of water to 1.28GPF.

Elongated toilet seats are ranked at the top in flushing efficiency with double-cyclone flushes.

Pros and Cons of  Rounded Toilet Seats

Pros Cons
More convenient for younger users Not comfortable for taller and larger men
Relatively cheaper Less hygienic and difficult to clean
Traditional look Use more water to flush
Fits well in small spaces Does not appear great in a large bathroom
Easier to find Less flush valve

round toilet seatsFirst, if you plan to use a potty seat on your toilet for your little girl or boy, it will be better you get a rounded seat.

Your little one’s legs are much shorter than yours so a rounded toilet seat is better for balance and safety and makes kids feel more secure while learning the skill of using the toilet.

If you have an elongated toilet, you can install a round toilet seat for the sake of training.

Secondly, round toilet seats are slightly less cheap than elongated toilets and most toilet seats are designed for round bowls. Elongated toilet seats are available but they are harder to find.

Measurements of elongated vs round toilet seats

Since the 1950s, Northern America has been producing toilet seats, most of which are still being used to this day.

For an elongated or extended type of toilet bowl seat, the seat length is 18 ½ inches. For the round toilet seat, the seat length is around 16 ½ inches. The shape is highly dependent on the comfort of the user.

When you are buying a new toilet seat or replacing an existing one, the first thing you need to determine is size. It’s easy to find out. All it takes is a tape measure.

Every seat has one size or the other indicated on the packaging. While one looks rounder than the other, you can’t always tell the difference simply by looking. But you can tell by measuring.

Using a tape measure, measure the distance from the center of the mounting holes on the back of the bowl to the rim in the front. If the measurement is 16-1/2 inches, your toilet requires a round seat.

A measurement of 18-1/2 inches means your toilet will need an elongated toilet seat

Bottom Line
The best end-users review however is in favor of the elongated/extended American Standard Toilet.

The elongated toilet seat is the most commonly installed in American and Canadian homes because of its modern and timeless look and add to the fact that an elongated seat is more comfortable to sit on, especially if you are tall or larger in stature.

Add that to other factors and you’ll have your reason about why they’re more popular.

Check our Comprehensive Review of The Best 9 Quality Elongated Toilet Seat of 2021

Maximum Flushing Power

It draws water into the bowl more quickly with its extra-wide 3-inch flush valve compare to other 2-inch rounded toilet, this result in a more forceful flushing action.

A 2-1/8 inch large glazed trap-way offers unmatched power for one-flush superiority that prevents it from clogging.

Good Looks and Very Comfortable

Elongated toilets are very attractive in color, by adding a unique sculpted design makes it more elegant.

They are also ADA compliant toilets with a high-profile seat that gives you the ultimate comfort while sitting in there. This is highly beneficial for an elder member of the family and the disabled as well.

Easy To Clean

This one-piece toilet is easier to clean than a conventional two-piece. Made of high quality highly durable polypropylene plastic materials.

Highly resistant to chemicals and cleaning agents that ensure its toughness and long life porcelain making it non-sticky to dirt and stays clean for a longer period, if you truly value your time, this toilet saves the day.

The seat is specially molded that perfectly shape your body contour for maximum comfort. It also comes in an anti-slid design that prevents it from slipping while you’re sitting there.


This is made possible with the built-in hinge system that slows down as it lowers the bowl seat. A top tightening mounting bolt is provided to ensure its easy installation and removal when cleaning.

Elongated toilet seats are high-end toilet designs for maximum flushing performance that get rid of your clogging problem for years. The looks are superb and are made of the finest materials which are very durable that stays in top shape for years.

Can an Elongated Toilet Seat easily fit on a Round Toilet?

Before you go ahead and uninstall your current toilet lid, consider your current seat. Ensure you determine whether is rounded or elongated.

Although an elongated toilet seat would technically also fit on a round toilet seat, its elongated end will likely overhang in a round toilet bowls.

What is the main difference between Round vs Elongated Toilet Seat?

To determine if your toilet is round front or elongated, measure the distance between the center of the bolt hole (which connects the seat to the bowl) out to the front rim of the toilet.

If it measures approximately 16 ½ inches your toilet is a round front. If it measures approximately 18 ½ inches, it is an elongated model.

Which Toilet Shape is the most comfortable & easy to use, Elongated, or Round Toilet Seat?

The best end-users review is in favor of the elongated/extended American Standard Toilet because of its modern and timeless look and adds to the fact that an elongated seat is more comfortable to sit on, especially if you are tall or larger in stature.

Nonetheless, round toilet seats are the best for families with potty training children.

If all the toilets in your house have elongated seats, consider rounded toilet seats for one or more of them, at least the toilet in the bathroom closest to your child’s bedroom.

Along with increased seating comfort, elongated toilet seats are associated with being a higher end. They look a bit more stylish and up to date and they have a more sophisticated look and feel.

Are Toilet Seats one size fits all?

Most seats come in round or elongated ovals; note which style your current seat is shaped.

In the industry there are standards for toilet seats- all toilets have seat post holes on 5 ½ inches centers- all elongated bowls are 18 ½ inches from seat posts to the front of the rim and round bowls are 16 ½ inches.

Any manufacturer’s seats will fit any toilet manufactures bowls if they are standard round or elongated. If a manufacturer design and makes a bowl with different dimensions/measurements, then they must provide a special seat.

How can I perfectly measure for a Replacement Toilet Seat?

When replacing a toilet seat, it’s important to determine that your replacement seat fits. Measure the length between the center of the bolt hole (which connects the seat to the bowl) out to the front rim of the toilet.

If it measures approximately 16 ½ inches your toilet is a round front. If it measures approximately 18 ½ inches, it is an elongated model.

Be sure to measure the length, width, and height also. If your seat toilet perfectly matches the porcelain, you might want to keep the color scheme consistent.

For a bolder style, choose a rich, dark color such as black, burgundy, or hunter green.

How can I replace my toilet seat?

Now that you are equipped with all the proper tools and the replacement seat, it is time to remove the existing seat. Follow these steps and you’ll have a new ‘throne’ in no time!

Close the toilet seat. Loosen the twin nuts on the bolts with an adjustable wrench; they are typically located/found underneath the toilet rim.

These bolts are usually covered with a plastic cap. To remove the cap, use a flat head screwdriver. If they are rusted or corroded, be careful.

If you are having difficulty loosening the nuts, use your pliers to hold the bolt steady as you loosen the nuts.

Apply penetrating oil to help; for very difficult nuts, allow the oil solution to soak overnight. If you are concerned about stripping the porcelain, wrap the tape (painter or masking) around the nut and then apply gentle pressure.

Before you call a professional to remove stubborn nuts, try using a saw. Before you use the saw, however, tape cardboard around the toilet bowl rim to protect the porcelain.

Additionally, raise the lid (both the cover and the actual toilet bowl rim) and cover the top of the toilet bowl as well with cardboard. Now saw through the bolts with the saw.

Before you install your new seat, properly dispose of the old seat as it may be covered in germs. Additionally, examine the area to wipe away rust stains or other debris from the toilet area. Be sure to check under the toilet bowl rim to remove any rust stains.

You’re now ready to install your brand new toilet seat. Align the seat precisely in it rightful position and insert the two bolts that are ment to fasten the seat to the toilet; there should be two bolt holes where the previous fasteners were located.

To prevent a difficult removal process the next time, coat your existing bolts with petroleum jelly just in case.

Next, slip on the washers and then the nuts. First, tighten the nuts with your bare fingers, and then it is advisable to tighten the nuts with your adjustable wrench.

If you find that the nuts are easily turning the bolt as you are attempting or trying to loosen, hold the bolt in place with a pair of pliers.

Be sure to lift the seat up and down a few times to be sure the lid moves freely. If the unit seems too loose, continue to tighten. Finally, apply the plastic two caps to cover the ends of the bolts.