Visible opening
The front opening between the inside edges of the frame face. This planner uses that span as the miter short-point dimension.
Visual picture-frame cut planner
See exactly where every frame measurement begins and ends.
Calculate long points, short points, openings, package dimensions, stock length and kerf with a front view, cross-section and 45° cut diagram.
MetricDecimal inchesFractional inchesPrintable cut sheet
Production v1 workspace
Plan a frame from the dimension you know
Internal math uses millimetres. Display rounding is separate, so switching between metric and fractional inches does not change the underlying geometry.
Outside size—
Visible opening—
Rabbet opening—
Total stock—
Cut list
Geometry basis: visible opening = rabbet opening − 2 × rabbet width. Finished outside = visible opening + 2 × moulding face width. For each member, long point = outside span and short point = visible-opening span.
Measurement definitions
Three lines that are often confused.
Rabbet opening
The wider rear shoulder opening that receives glass, mat, artwork and backing. Fit clearance is added around the package.
Long point
The outside tip-to-tip length of each mitered member. It equals the matching short-point span plus two face widths.
FAQ
Cutting checks.
Why can terminology differ?
Framing shops and saw setups sometimes measure from the rabbet shoulder instead of the front short point. This planner labels both spans and documents the basis used for the cut list.
How is kerf counted?
The stock summary can include eight conservative kerfs—two miter cuts for each of four members. A production stop-block workflow may use stock differently, so review the allowance.
Does fractional rounding change the frame?
No. Internal millimetre values remain unchanged. Fraction precision controls only the displayed cut marks.
Can I save as PDF?
Use Print cut sheet and choose “Save as PDF” in the browser print dialog.