Picture Frame Size Calculator
Our other calculator computes picture frame size instantly. Get useful results with practical tips and recommendations.
Reviewed by Daniel Agrici, Founder & Lead Developer
Formula
Total Frame Width = Art Width + (2 x Mat Width) + (2 x Frame Width)
The total frame dimensions are calculated by adding the mat border and frame molding to each side of the artwork. The mat width is added twice (once per side), and the frame molding width is added twice. Glass size equals the mat outer dimensions, and the frame perimeter determines how much molding material is needed.
Worked Examples
Example 1: Standard Photo Framing
Problem:Frame an 8x10 inch photo with a 2-inch mat border and 1-inch frame molding. What are the total outer dimensions?
Solution:Mat outer width = 8 + (2 x 2) = 12 inches\nMat outer height = 10 + (2 x 2) = 14 inches\nTotal frame width = 12 + (1 x 2) = 14 inches\nTotal frame height = 14 + (1 x 2) = 16 inches\nGlass size = 12 x 14 inches\nFrame perimeter = 2 x (14 + 16) = 60 inches = 5 linear feet
Result:Total frame: 14 x 16 inches | Glass: 12 x 14 inches | Perimeter: 60 inches
Example 2: Large Artwork with Wide Mat
Problem:Frame a 16x20 inch print with a 3-inch mat and 1.5-inch ornate frame. Calculate all dimensions.
Solution:Mat outer width = 16 + (3 x 2) = 22 inches\nMat outer height = 20 + (3 x 2) = 26 inches\nTotal frame width = 22 + (1.5 x 2) = 25 inches\nTotal frame height = 26 + (1.5 x 2) = 29 inches\nGlass area = 22 x 26 = 572 square inches = 3.97 square feet\nFrame perimeter = 2 x (25 + 29) = 108 inches = 9 linear feet
Result:Total frame: 25 x 29 inches | Glass: 22 x 26 inches | Perimeter: 108 inches
Frequently Asked Questions
How do I determine the right frame size for my artwork?
The right frame size depends on the artwork dimensions, desired mat border width, and the frame molding width you select. Start by measuring the actual artwork or photo you want to frame, then add the mat border width on each side, and finally add the frame molding width. For a standard 8x10 inch photo with a 2-inch mat and 1-inch frame, the total outer dimensions would be 14x16 inches. Most framing professionals recommend a mat width between 1.5 and 3 inches for standard photos, with larger artwork benefiting from wider mats to create visual breathing room around the piece.
What are standard picture frame sizes?
Standard picture frame sizes in the United States follow common photo and print dimensions. The most popular sizes include 4x6, 5x7, 8x10, 11x14, 16x20, 18x24, and 24x36 inches. For matted frames, common combinations include an 11x14 frame with an 8x10 mat opening, a 16x20 frame with an 11x14 mat opening, and a 20x24 frame with a 16x20 mat opening. European standard sizes differ and typically use metric measurements like 10x15 cm, 13x18 cm, 20x30 cm, and 30x40 cm. Choosing a standard size saves money compared to custom framing, as standard frames, mats, and glass are mass-produced and readily available at most craft and home decor stores.
What types of glass should I use in picture frames?
There are several glass options for picture framing, each with different benefits and price points. Regular clear glass is the most affordable and provides basic protection, but it creates glare and reflects light. Non-glare or anti-reflective glass has a slightly frosted surface that reduces reflections, though it can make artwork look slightly hazy if the mat is thick. Museum glass is the premium option, offering 99 percent UV protection and virtually invisible anti-reflective coating, making it ideal for valuable artwork. Acrylic glazing, also called plexiglass, is lighter than glass and shatter-resistant, making it better for large frames or high-traffic areas. Conservation glass with UV filtering protects artwork from fading and is recommended for any piece you want to preserve long-term.
How does frame molding width affect the overall appearance?
Frame molding width significantly impacts the visual weight and style of the framed piece. Narrow moldings of half an inch to one inch create a minimalist, modern look that works well with contemporary artwork, photographs, and gallery walls with multiple frames. Medium moldings of 1 to 2 inches offer a classic look suitable for most artwork and home decor applications. Wide moldings of 2 to 4 inches create a dramatic, traditional appearance often seen with oil paintings, mirrors, and statement pieces. The frame width should complement the artwork size proportionally, with a general guideline being that the frame molding should not be wider than the mat border. Ornate, carved moldings add visual weight beyond their physical dimensions.
References
Reviewed by Daniel Agrici, Founder & Lead Developer · Editorial policy