If you are buying a ready-made shower enclosure with a tray, you only need to measure the bathroom to ensure the new bathing fixture will fit without any issues.
The situation can become a bit more complicated when you are replacing just one of the elements - either the enclosure or the tray. In this article, we will advise how to measure a semicircular shower enclosure and how to measure the tray to find a model suited to your needs.
How to calculate the radius of a shower tray
When you have a rectangular or square bathroom shower enclosure, matching a tray to it won’t pose any problems. It’s a different story entirely when we talk about a semicircular enclosure. How to measure the radius of a shower tray in this situation?

To measure the radius of a shower tray, you will need the right tools. Measurements are easiest to take using a measuring tape in the following steps.
- Step 1 - measure the length of the tray edge against the wall (A);
- Step 2 - measure the length of the straight section of the tray perpendicular to the wall, i.e., the straight section to the point where it begins to curve (B);
- Step 3 - subtract the second value from the first. The result is the radius of curvature of the semicircular tray.
By applying the above formula, you can select a semicircular tray to suit the dimensions of the enclosure in your bathroom. This way, you can also calculate how much space the new tray will occupy in the bathroom.
Can the enclosure and tray come from different manufacturers?
The most convenient solution is to purchase a shower enclosure and a matching tray from the same manufacturer. At the online store mexen.pl you will find shower enclosures with trays, as well as trays on their own. These include both rectangular and semicircular models.
However, nothing prevents the tray and the enclosure from coming from different manufacturers. You just need to ensure that both bathroom fixture elements are the same size. To do this, you need to measure the radius of the tray and select a piece that will fit the existing enclosure.
Similarly, if you know the radius of the tray installed in the bathroom, you can easily find a suitable semicircular enclosure that will fit perfectly.
Know the dimensions? Check out the range of enclosures and trays in the mexen.pl store.
How to measure the radius of a shower tray? Summary
If you want to get yourself a new model of the tray but don't want to change the shower enclosure, you must find a piece of the right size.
In the above article, we showed how to measure the radius of a tray using the appropriate tools. It’s a piece of cake. A simple formula comes to your aid here:
R = A - B
Let's remember:
- A - is the length of the straight edge of the tray against the wall.
- B - is the length of the straight section to the point where the edge of the tray begins to curve.
- R - is the radius of curvature of the tray that we are looking for.
By applying the above formula, you can easily check the radius of the tray, and thus learn whether the shower enclosure you plan to buy will fit the tray in your bathroom.