Photo and paper sizes in cm: 4×6, 5×7, 8×10, Letter and posters
To convert a size like 8×10 or 4×6 inches to centimeters, multiply each side by 2.54. These tables already convert the most common photo, paper and poster sizes, and the metric sizes back to inches.
Photo, paper and poster sizes in cm
| Inches | Centimeters | Typical use |
|---|---|---|
| 2 × 2″ | 5.08 × 5.08 cm | US passport photo |
| 3.5 × 5″ | 8.89 × 12.7 cm | Small print |
| 4 × 6″ | 10.16 × 15.24 cm | Standard photo print (most common) |
| 5 × 7″ | 12.7 × 17.78 cm | Medium print or greeting card |
| 6 × 8″ | 15.24 × 20.32 cm | Large print |
| 8 × 10″ | 20.32 × 25.4 cm | Portrait or framed photo |
| 8 × 12″ | 20.32 × 30.48 cm | Print in 2:3 ratio |
| 8.5 × 11″ | 21.59 × 27.94 cm | US Letter paper |
| 8.5 × 14″ | 21.59 × 35.56 cm | US Legal paper |
| 11 × 14″ | 27.94 × 35.56 cm | Framed print |
| 11 × 17″ | 27.94 × 43.18 cm | Tabloid / Ledger paper |
| 12 × 12″ | 30.48 × 30.48 cm | Scrapbook page, LP record cover |
| 12 × 18″ | 30.48 × 45.72 cm | Small poster |
| 16 × 20″ | 40.64 × 50.8 cm | Poster or canvas |
| 18 × 24″ | 45.72 × 60.96 cm | Medium poster |
| 20 × 30″ | 50.8 × 76.2 cm | Large poster |
| 24 × 36″ | 60.96 × 91.44 cm | Movie poster |
Metric photo and paper sizes in inches
| Centimeters | Inches | Typical use |
|---|---|---|
| 10 × 15 cm | 3.94 × 5.91″ | 10 × 15 cm photo (metric 4×6) |
| 13 × 18 cm | 5.12 × 7.09″ | 13 × 18 cm photo (metric 5×7) |
| 20 × 25 cm | 7.87 × 9.84″ | 20 × 25 cm photo (metric 8×10) |
| 21 × 29.7 cm | 8.27 × 11.69″ | A4 paper |
| 29.7 × 42 cm | 11.69 × 16.54″ | A3 paper |
| 14.8 × 21 cm | 5.83 × 8.27″ | A5 paper |
How to convert a two-sided size
A size such as 11×17 has two sides, and each is converted on its own: 11 × 2.54 = 27.94 cm and 17 × 2.54 = 43.18 cm. In the other direction, divide by 2.54: a 10 × 15 cm photo is 3.94 × 5.91 inches, practically a 4 × 6″ print.
When you order prints or frames, check whether the size refers to the paper or to the visible area: a frame with a mat shows a smaller window than the photo itself. Print shops also crop slightly when the photo’s shape (for example 4:3 from a phone) does not match the paper (2:3 for 4×6).
Letter vs A4
US Letter (8.5 × 11 in, 21.59 × 27.94 cm) is 0.59 cm wider and 1.76 cm shorter than A4 (21 × 29.7 cm). A document laid out for one usually prints on the other with “fit to page”, but margins and page breaks move, so set the paper size in your word processor before you print.
Frequently asked questions
What is 4x6 inches in cm?
4 × 6 inches is 10.16 × 15.24 cm, almost the same as the 10 × 15 cm photo sold in metric countries.
What is 8x10 inches in cm?
8 × 10 inches is 20.32 × 25.4 cm.
How big is 8.5 x 11 paper in cm?
8.5 × 11 inches (US Letter) is 21.59 × 27.94 cm. A4 is 21 × 29.7 cm: slightly narrower and longer.
What is 11x17 in cm?
11 × 17 inches (Tabloid) is 27.94 × 43.18 cm.
How do I convert a size like 12x18 inches to cm?
Multiply each side by 2.54: 12 × 2.54 = 30.48 and 18 × 2.54 = 45.72, so 12 × 18 inches is 30.48 × 45.72 cm.
Related converters
Inches to cm converter · CM to inches · Inches to cm chart (with fractions) · Size guides in inches and centimeters