Picture Frame Size Calculator
Calculate the frame size needed for your photo with a mat border.
Enter photo dimensions and mat width to find the right frame.
Frame Size Needed
Picture frame size is determined by the photo dimensions plus the mat border on all sides.
Formula:
Frame Width = Photo Width + (2 × Mat Width)
Frame Height = Photo Height + (2 × Mat Width)
Common photo sizes:
- 4×6 in (10×15 cm) — standard print
- 5×7 in (13×18 cm) — portrait print
- 8×10 in (20×25 cm) — large print
- 11×14 in (28×36 cm) — poster size
- 16×20 in (41×51 cm) — gallery size
Standard mat widths:
- 1.5 inches (3.8 cm): minimal border
- 2 inches (5 cm): standard
- 2.5–3 inches (6.5–7.5 cm): gallery style
- 3.5–4 inches (9–10 cm): museum style
Design tip: Mat width should be proportional to the image — larger images can support wider mats. The bottom mat is sometimes made slightly wider than the top for visual balance.