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About Picture Frame Calculator

Picture Frame Calculator turns artwork measurements into a practical framing worksheet you can use at the workbench.

Enter the artwork width and height, then add a mat border, optional bottom weight, artwork overlap, moulding face width, and frame-lip overlap. The app calculates the mat window, mat board, glass and backing, rabbet opening, outside frame size, and two horizontal plus two vertical 45° long-point rail lengths.

Key features:

- Switch every measurement between inches and centimeters without retyping
- See a proportional preview of the moulding, mat, and artwork
- Account for the frame lip that overlaps the glass or mat
- Review 45° long-point rail lengths for all four sides
- Estimate net moulding length and a 10% material allowance
- Swap artwork orientation while keeping the entered values
- Copy a concise cut plan to the clipboard when you choose
- Catch impossible overlaps and missing measurements before cutting
- Use a responsive layout designed for phones, large screens, and larger text
- Work entirely offline with no account, ads, analytics, or cloud sync

Picture Frame Calculator is a planning aid. Always verify the actual rabbet, fit clearance, saw kerf, joint setup, material, and every measurement before cutting glass or moulding.