Dimension
Values use the entered units and do not include warping of a real frame.
Local browser tool
Mat board calculator
Calculate window, margins and a weighted mat bottom.
🔒 Data stays in this browser.
Enter details
Enter real dimensions in centimetres. Load the example to see how it works. After calculation you can save, copy or download the result where supported.
How to interpret the result
Tolerance
For hand cutting, add a controlled allowance and test on scrap material.
Artwork protection
Sensitive artwork should not touch glazing or materials of unknown composition.