Step 1 - Choose Options

Feet/Inches Metric
Polymer Cast Iron

Step 2 - Enter Radius or Height

Radius Length:
Have Radius Have Height

Step 3 - Enter Chord or Arc Length

Chord Length
Have Chord Length Have Arc Length


Tile Size
Wedge Size

Arc Length Segment Length
(tile + wedge)
Arc Overrun Variance Area

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Our Radius calculator is provided as a reference to help you estimate the amount of material you need for your project. This calculator provides an ESTIMATE.

Coverage is affected by a number of factors. ** In order for us to ensure that you have adequate material for your job, please round up to the nearest foot.

Enter values in the 2 fields provided (Radius Length and Chord Length) then click the 'Calculate' button to create the estimate for your Radius installation. You can enter the Height or Rise in lieu of the Radius Length. Arc Length can be used as an alternative to the Chord as well. The recommended Tile Size, Wedge Size and their respective Quantities will display in the space provided.

The Metric option will expect the lengths to be entered in Meters.

Polymer vs Cast Iron will make use of the 24”x36” tiles or 24”x30” respectively as required.

The values ‘arc length’, ‘segment length’, ‘arc overrun’ and 'variance' are informational.

Arc Length is calculated when the chord length is given. Segment Length is known by adding the top edge lengths of 1 selected Tile and Wedge. Arc overrun is the remainder when the Arc Length is different than the sum of the Tiles and Wedges. Variance occurs when the Radius calculated is different than the Radius made from the suggested components. The variance amount is the distance between those two values.

The Size change warning line will display when the program calculates an ‘Arc overrun’ that is negative. In the case when a smaller tile will leave less extra radius it recommends that instead of just adding another equal width tile. So if the job calls for 7 24”x24” tiles and 7 wedges and it leaves less than 14 inches of remaining radius, it tells the user to order 1 24”x12” tile instead of another 24”X24”. The same goes for 30” and 36” wide tiles where it can substitute a 24”X12” or 24”x24” as required. This is only a suggested solution.