01
How to use it
Calculate mat board outer size and window opening from artwork size and border.
Mat board size calculator
Calculate mat board outer size and window opening from artwork size and border.
Change the inputs and the browser recalculates the result immediately.
Mat board size calculator
02
Available as a real page
This is a directly openable tool page, not a placeholder embedded slot.
Frequently asked questions
Are inputs sent to the server?
No. This helper calculates only inside your browser.
Is the result exact enough for professional production?
Color, size, and material estimates are planning references. Confirm final values with your material, printer, or shipper.