Source: https://restorebunny.com/tools/photo-mat-calculator/

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# Photo Mat Calculator

Enter frame and photo dimensions plus the overlap that holds the photo behind the mat. Calculate the opening and border widths in inches.

Free · No signupLocal browser processing

Frame width (in)Frame height (in)Photo width (in)Photo height (in)Overlap per edge (in)

**Result**Ready for your input

Your result will appear here

No signup or server upload.

These are planning dimensions, not cutting instructions or a framing guarantee. Confirm frame rebates, mounting clearance and material choice with the framer.

**Give an old photo a fresh start**

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## How to use photo mat calculator

1. Enter the values for your calculation.
2. Adjust the controls and inspect the result.
3. Download the calculation as text or revise your inputs.

## A practical example

An 8 × 10 photo with 0.125-inch overlap on every edge needs a 7.75 × 9.75 opening. In an 11 × 14 frame, centered borders are 1.625 and 2.125 inches.

## Frequently asked questions

Is photo mat calculator free to use?

Yes. This utility works without a signup or paid credit. Files and calculations are processed in this browser.

What should I check before using the result?

These are planning dimensions, not cutting instructions or a framing guarantee. Confirm frame rebates, mounting clearance and material choice with the framer.

## Keep working on your photo

- [Browse all free tools](<https://restorebunny.com/tools/>)
- [Check photo resolution](<https://restorebunny.com/tools/photo-resolution-checker/>)

[Browse all free tools](<https://restorebunny.com/tools/>)

By RestoreBunny · Reviewed 2026-10-16. Utilities use local calculations or [browser image processing](<https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Tutorial/Pixel_manipulation_with_canvas>). The download button identifies the output format. Animated images export one decoded frame. Keep your original files.