It is exact arithmetic
Given your deductions, the sizes are worked out the same way every time — no mental arithmetic, no transcription mistakes.
Free tool · no sign-up
Glass & mesh cut size calculator.
Type an opening size, set the deductions your shop actually uses, and get the glass cut size, mesh cloth size and profile cut list. Nothing to install, nothing to register.
1 · The opening
2 · Your deductions
These are typical values for a 27 mm sliding system. Every shop is different — change them to match yours and the sizes below follow. This is the only thing that decides whether a cut size is right.
Want to keep this?
The full app saves it as a project, applies your own rates, and prints the quotation with drawings, a glass schedule and GST.
Start the free trialHonest about this
What the calculator can and cannot tell you
It does not know your system
It cannot read your extruder's catalogue. You supply the deductions; the full app stores them per system so you set them once.
Check it against a real window
Take one you have already fabricated, enter the opening, and compare. If it matches, it will keep matching.