Picture Mat Size Calculator
Calculate mat board and frame sizes for artwork with even or weighted borders.
Enter your values to see the result.
Continue your work
- Picture Frame Sizes — See standard frame sizes.
- Photo Print Sizes — Choose a print size.
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Clear instructions
Find steps, examples and limitations below.
Use online
Open the tool in a supported web browser.
Free to use
No sign-up required. Tool-specific limits may apply.
How to use the Picture Mat Size Calculator
Calculate mat board and frame sizes for artwork with even or weighted borders.
- 1 Enter the artwork size and unit.
- 2 Enter the mat border and overlap, and choose bottom-weighting.
- 3 Read the mat opening, frame size and nearest standard frame.
Example and practical tips
An 8 × 10 in print with 2 in borders and a 1/4 in overlap needs a 7.5 × 9.5 in opening and an 11.5 × 13.5 in mat.
Frequently asked questions
Why overlap the artwork?
A slightly smaller opening holds the art in place so it cannot fall through.
What is bottom-weighting?
A slightly wider bottom border, which looks more balanced on the wall.
Report an issue
Something broken or not quite right? Tell us and we will look into it.