Cabinet Door Calculator
Find the size of overlay or inset cabinet doors for an opening, and the rail, stile and panel sizes to build them.
Change the values and press Calculate to work out your own figures.
Enter the opening and choose one door or a pair and the style.
Show the working
- rail = door width − 2 × stile + 2 × groove
- panel = rail − 2 × expansion gap
How to use it
Enter the opening and choose one door or a pair and the style.
Lengths can be decimals, fractions or tape entries such as 12' 6 1/2" (in feet or inches). Prices are optional.
Key facts
rail length = door width − 2 × stile + 2 × groove panel = rail length − 2 × expansion gap (and the same for the height)
Overlays
Full overlay is often 1/2 in or more; partial overlay 3/8–1/2 in. Hinges set the exact overlay, so check them first.
Questions
What size door for a 17 × 24 in opening?
18 × 25 in with a 1/2 in overlay.
Formulas
rail length = door width − 2 × stile + 2 × groove panel = rail length − 2 × expansion gap (and the same for the height)
Sources
Limitations
- Material densities are typical values (the midpoint of the commonly published range); real loads vary with moisture, grading and compaction, so check with your supplier or type in their density.
- Tank results are the geometric volume; real tanks have wall thickness and fittings.