How to Measure Corner Toilet Rough-In Dimensions

When you purchase a new toilet, the first thing you will probably check is the toilet’s rough-in dimensions. Doing so will enable you to determine whether the toilet will fit in your bathroom. It would be best to look out for specific measurements, including rough-in, tank height, toilet depth, and bowl shape. But how do you take a corner toilet rough-in dimensions? Continue reading to gain insights into how to measure a corner toilet’s dimensions.  

What Do You Need to Measure Corner Toilet Rough-in Dimensions?

As toilets age, they inevitably undergo wear and tear. The leaks that accompany the toilet’s degradation often prompt you to replace an old toilet. It would be best to know the toilet’s dimensions when replacing it to avoid purchasing an oversize or undersized commode.

Even though you can use your eyes to estimate a toilet’s dimensions, you need proper tools to determine the exact measurements. The tools include:

  • A tape measure
  • A pencil or a marker

How to Measure a Corner Toilet Rough-in Dimensions

When purchasing a corner commode, the last thing you want is a toilet that does not fit in the allotted corner space in your bathroom. Here are the steps you should follow when taking the rough-in measurement for a corner toilet:

  • Identify the position of the closet bolts at the base of the toilet. You must know that white toilet bolt caps can camouflage the closet bolts, making it difficult to discern their locations. 
  • Identify the location of the flange outlet. It would be best to estimate its position since the current toilet covers it. It is worth noting that the flange outlet is typically positioned at the central point of the space between the closet bolts. 
  • Use a marker to indicate the approximate location of the flange outlet. 
  • Place the tip of your tape measure on one of the adjacent walls and stretch it out to the marked flange outlet. Ensure that your tape measure is perpendicular to the left or right adjacent walls when stretching it out to your presumed flange outlet. The reading on your tape measure is the toilet’s rough-in size.  
Rough-in for corner toilet and wall-mount toilet
Rough-in for corner toilet and wall-mount toilet

Besides the rough-in measurement, here are other critical corner toilet dimensions to take before replacing your old toilet:

Tank Height

Measuring tank height enables you to determine whether your novel commode will fit in the space below the shelves in your bathroom. It is worth noting that a commode’s tank height refers to the distance between the bathroom floor and the cistern top. In measuring the tank height, place the tip of your measuring instrument on the bathroom floor and stretch it out to the highest point on the cistern. 

Toilet Depth

Toilet bowls assume either an oval or circular shape. Circular bowls occupy relatively less space than oval bowls. Additionally, oval bowls offer a greater level of comfort. It is vital to consider this when replacing your old toilet. 

Measuring a toilet’s depth requires you to place the tip of your tape measure at the front section of the bowl and stretch it out to the tank’s rear. If the toilet’s depth meets your preferred dimensions, you can purchase a novel commode with similar dimensions. You should acquire a toilet with greater depth only if you have additional room to spare in your bathroom. 

Measuring Toilet Rough-in When the Commode Isn’t There

Measuring rough-in dimensions in the absence of the toilet is pretty straightforward. Here are the steps you should follow:

  • Identify the position of the flange outlet on the bathroom floor. It is worth noting that the flange outlet is unmistakable on your bathroom’s floor. 
  • Place the tip of your tape measure on the rear wall and stretch it out to the middle of the flange opening. 
  • Your reading is probably correct if you get a rough-in measurement between 10 and 12 inches. 
Standard toilet rough-in dimensions
Standard toilet rough-in dimensions

Measuring the Rough-In Dimension of a Standard Commode

You can measure a toilet’s rough-in without necessarily removing it to get a clear view of the flange outlet. Doing so requires pinpointing the toilet’s closet bolts or the trap way’s visible profile. Here are the steps you should follow:

Identify the closet bolts at the base of your commode. Most toilets have toilet bolt caps that conceal toilet bolts. You must know that toilet bolt caps are typically positioned on both sides of the commode’s trap way path. You can use a marker to mark the position of the bolt caps at the toilet’s base. 

Place the tip of your tape measure on the rear wall and stretch it out to the middle of the marked closet bolt position. The reading on the tape measure is the rough-in measurement. Avoid placing the tip of your tape measure against the baseboard and other moldings. 

Always adjust your tape measure to begin from your bathroom’s bare wall above the molding. You can also measure the molding’s width and add that to the distance between the molding and the flange outlet to get an accurate result. Ideally, your rough-in reading should fall between 10 and 14 inches. 

Why Get a Corner Toilet?

 You might have noticed that corner toilets are rare fixtures in homes and business establishments. Nonetheless, the commode has its fair share of benefits. The benefits include:

Saves Space

Corner toilets quintessentially fit in bathroom corners. This enables you to save space that might have otherwise been wasted. You can add other bathroom fixtures in the extra space if needed. 

Ideal for Small Bathrooms

The practical design of corner toilets makes them ideal for smaller bathroom spaces. This ensures that bathroom users do not feel cramped in a small area. The extra wriggle room gives extra comfort and convenience to bathroom users. 

Unique Design Packed with Distinct Technologies

The unique designs of corner toilets make them aesthetically pleasing. They also have eco-friendly technologies that allow for water saving. 

Bottom Line

If you intend to replace your current toilet, you need to measure its dimensions accurately. Failure to do so can lead you to purchase an oversized or undersized commode. A tape measure and a marker are all you need to measure your toilet’s rough-in, tank height, and bowl depth. 


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