Since 2016, we are the inventor of 20 – 21 inch Extra Tall toilets and the leader in our category. Trusted by thousands of our valued customers in the U.S. and Canada. We ship from Charlotte, NC. Please browse our site and let us know how we can help you.

Toilet Specs, Measurements

Toilet Measurements (click dropdown to open / to see all)

Convenient Height brand extra tall toilet measurements


Convenient-Height Model S Specs PDF downloadable file

Please browse all sections to find the measurement needed. If you need a more specific measurement please contact us and we will assist you.


toilet specs Toilet Dimensions Measurements Specs
Toilet Dimensions, Measurements, Specs

Seat mounting holes distance

Heating baseboard behind tall toilet

Toilet 20 inch Extra Tall by Convenient Height bowl taller than ADA Comfort Height


Toilet bowl inner dimensions
Toilet bowl inner dimensions


Back of toilet base bottom to center of bolts
Back of toilet base bottom to center of mounting bolts
Heating baseboard behind toilet - will it work?

Yes. With a baseboard heater behind the toilet Convenient Height 20 inch extra tall toilet will work. We made the drawing on this subject
Heating baseboard behind toilet

Actual height of a Convenient Height toilet without and with a toilet seat?

Without a toilet seat: Convenient Height toilet bowl measurement is 20 inches (50 centimeters) when measured from the floor to the top of the toilet bowl rim. With a toilet seat: most of the standard toilet seats are 1 to 1.5 inch high (not including the seat cover) and a Convenient Height toilet Model S with a toilet seat measures 20-21 inches from the floor to the top of any regular style elongated toilet seat.

Bidet mounting hole dimensions

Very many of our Convenient Height customers decide to add a bidet to the Tall Toilet. Nearly 40% of all customers purchase a bidet for added convenience. Our tall toilet and bidet is known to be a Powerful Combination of Convenience. We made our toilet highly compatible with nearly all bidets manufactured according to the general bidet fit standards. Prior purchasing a bidet, please review the measurements here shown in the drawings and compare them to the measurements outlined in the bidet specification sheet.

Seat mounting holes distance

I am happy to say we really enjoy the other two toilets already installed. The extra height is really nice! We have also installed Bio-Bidet on each toilet as well. I’ve attached a pic as well.
— Keith
Once seat is lifted, how high is seat extending above tank to clear shelf installed over toilet?

To paraphrase the question, here the measurement was needed of when the toilet seat is open (lifted vertically). Then the question was how high does top of seat come up over the tank? The customer had a shelf right above the toilet. To answer this question, seat lifted will add 2 inches (actual) in overall height.  But add 3 inches to total height. The seat actually goes up just 2 inches above, but we want extra inch to ensure it cleared. So let’s add 3”.

In that case: make it 36-1/2” + 3” = 39-1/2″

The overall height required to clear the seat will be 39-1/2”.

toilet seat over tank

Bowl Base measurements (Tall Toilet bottom floor tile cover)

Our Tall Toilet base measurements help determine if your existing toilet footprint will be covered. Our toilet base is considered to be large and covers more sq. inches than other toilets.  Mostly, bathrooms have tile laid around the plumbing drain, which means your new tall toilet will cover tile in full, not leaving any gaps. The measurements were drawn to show about 1 inch less on purpose to leave 1 inch for safe measure.

Toilet floor mounting coverage
Toilet floor mounting coverage
What is accurate length of toilet? (back end to tip of bowl front, to clear door swing)
The overall length is 27″, with the 1/2″ variations. As we continue producing we will determine if 1/2″ is a permanent increase for the back to the tip of the bowl front (length). There may be units that get produced at 27″ to 27-1/2″. Usually 1/2″ is not a deal breaker for the measurements and bathroom fit, but it also may be. So we always recommend leaving an inch or two in play when deciding to order, for things like the door swing to clear. Especially since the way your toilet drain works is it will Not be a perfect fit, right to the millimeter. It never is for any toilet. All the plumbing drains and drain flanges are considered “roughs” and that is why they are called “a rough-in”. So they naturally have some room to move the entire toilet on the flange until it is set and bolted down.
How to measure toilet rough-in: measure from the wall and not the baseboard.

Measure from the wall behind the toilet to the center of one of the floor bolts (the bolts that hold the toilet down). Compare this measurement to the Convenient Height rough-in of 12 inches. Rough-in: 12″ standard. Fits rough-ins of 11-1/2″ and up (distance from the wall to the floor  mounting bolts of 11-1/2″ is the very minimum requirement) If the rough-in at your toilet is equal or longer than 12 inches then our toilet will fit onto your current toilet drain easily. Your rough in can be 13″, 14″ or more (unusual) and as long as it is equal or above 12″ our toilet will fit.

How much do the 20 inch Convenient Heigh toilets weigh?

Our 20 inch extra tall Convenient Height toilet weighs under 100 lbs. without safe packaging. Shipping and packing materials add about 10 lbs. to the total weight of the freight.

Is the tank lined?

Thank you for your interest in the Convenient Height tall toilet and Thanks for your question about out toilet tank. Our tank is made of very high quality porcelain/ceramics and does not come with a lined tank. Lined tank is otherwise known as a tank with Anti-Condensation Toilet Tank Liner. If you live in the hot and high humidity climate and your toilet tank does “sweat”, we know there are Anti-Condensation Toilet Tank Liner Kits (sold for around $15 and manufactured by other companies, not ours) with following features: The toilet tank anti-condensation liner kit helps prevent water from forming on the outside of a tank by creating a barrier between the warm outside air and cold water inside the tank. Thank you for your question. Was our response helpful?..
If there is anything else we can help with please ask anytime! Eddie at the Convenient Height Co.

Is toilet bowl trap-way glazed?

Yes, it the bowl trapway is fully glazed.

What is the measurement from the rim to the water level? Many manufacturers can't tell me what the number is, but for my husband it is important.

This is a very popular question about the Convenient Height brand 20 -21 inch tall toilet. When measuring from top of the rim down to the surface of water, the distance is 8-9 inches. When measuring from water surface up with a toilet seat lowered, distance gains one more inch from water surface (waterline) to the top of the toilet seat, making the water surface (waterline) distance to the top of the seat up to 10 inches. Another, different toilet bowl water level measurement is when measuring water amount level at the bottom of the bowl. This toilet bowl water level is measured from the bottom of the visible part of the trap bend to the water surface – and this measurement is about 5 inches. One may wonder, if the bowl height is 20 inches, top of the rim down to the water surface distance is around 10″, bottom trap bend to water surface is about 5″ – where did the 5 inches go in this 20-inch Convenient Height toilet?.. The answer is: we built the trap at the elevation of 5 inches, which works from bowl strength engineering standpoint and allows for added height/gravity power for a better speed of the siphonic flush action down the drain, literally! If you have any other questions or need clarifications on this Amazon Answer about Convenient Height toilets, please reply to this post or submit your own question. Thanks!

Is weight capacity of toilet bowl 500 lbs.?

The static weight capacity is 500lbs.*

*We have done static weight capacity testing for the Convenient Height tall toilet bowl. Static weight being the amount of total weight placed on a toilet bowl and held stationary (not moving). Our bowl will hold a lot of weight without toilet bowl breaking, with weight in a stationary state. We take into consideration safety factors and the fact, weight on the bowl is not always stationary when in the bathroom.