Picture Frame Size Calculator for Garden Displays

Size frames for garden signs, labels, and prints. Choose mats, borders, and mounting allowances easily. See finished outer dimensions and order materials without waste.

Calculator

Fields marked * are required. Choose units, enter sizes, then submit.

All outputs match the chosen unit.
Auto-swaps width/height for chosen orientation.
Typical: 0.25 in (≈6 mm).
Adds breathing room for outdoor movement.
For a visual “weight,” bottom is often larger.
Adds to both sides for finished outer size.
How much the frame covers the mat/glazing.
Small reduction helps fit without binding.
Accounts for miter errors and defects.
Used for planning stock length.

Formula used

  • Mat outer = Artwork + left + right (and top + bottom).
  • Rabbet opening = Mat outer + 2 × Fit allowance.
  • Frame outer = Rabbet opening + 2 × Face width.
  • Mat window = Artwork − 2 × Overlap.
  • Glass cut = Rabbet opening − 2 × Glass clearance.
  • Moulding length = Perimeter × (1 + Waste%).

For outdoor garden décor, fit allowance and waste help. Wood can move with humidity, and miters may need trimming. Adjust values based on your materials.

Tip: Use acrylic glazing for safer patio and greenhouse displays.

How to use this calculator

  1. Measure your garden sign, print, or artwork width and height.
  2. Select units, then enter mat borders for each side.
  3. Set overlap so the mat holds the artwork securely.
  4. Enter frame face width and clearance settings.
  5. Click Calculate to see outer size and cut sizes.
  6. Use downloads to keep a build sheet for later.

Example data table

Sample inputs and resulting outer sizes for common garden display prints.

Artwork Mat borders Face width Fit allowance Estimated outer size
8 × 10 in 2 in each side 1.25 in 0.125 in 14.75 × 16.75 in
10 × 12 in 2.5 in each side 1.5 in 0.125 in 18.25 × 20.25 in
20 × 30 cm 5 cm each side 3 cm 0.3 cm ~36.6 × 46.6 cm

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.