How to convert inches to cm
Multiply inches by 2.54. To convert centimeters back to inches, divide by 2.54. The conversion is exact; only the displayed rounding changes. Convert width and height separately for rectangular papers or photographs.
Is 12x12 paper the same as 30x30 cm?
Not exactly. A 12x12-inch scrapbook page is 30.48x30.48 cm. Paper sold as 30x30 cm is about 11.81x11.81 inches, so it is slightly smaller on every side. This matters when fitting page protectors, cutting borders, or printing at 100 percent scale.
Common printable paper conversions
Use this quick reference for scrapbook paper, journals, photographs, cards, signs, and printable posters. The values are the same in portrait and landscape; only the order of width and height changes.
| Format | Inches | Centimeters |
|---|---|---|
| 12x12 scrapbook | 12 × 12 | 30.48 × 30.48 |
| US Letter | 8.5 × 11 | 21.59 × 27.94 |
| US Letter landscape | 11 × 8.5 | 27.94 × 21.59 |
| US Legal | 8.5 × 14 | 21.59 × 35.56 |
| Long bond paper | 8.5 × 13 | 21.59 × 33.02 |
| A4 | 8.27 × 11.69 | 21 × 29.7 |
| A5 | 5.83 × 8.27 | 14.8 × 21 |
| 6x6 mini album | 6 × 6 | 15.24 × 15.24 |
| 4x6 photo | 4 × 6 | 10.16 × 15.24 |
| 5x7 photo or card | 5 × 7 | 12.7 × 17.78 |
| 8x10 photo | 8 × 10 | 20.32 × 25.4 |
| Small card | 2.9 × 4.1 | 7.37 × 10.41 |
| Panoramic print | 6 × 10 | 15.24 × 25.4 |
| Wide photo | 6 × 9 | 15.24 × 22.86 |
| Scrapbook or art print | 12 × 15 | 30.48 × 38.1 |
| Medium poster | 12 × 18 | 30.48 × 45.72 |
| Large poster | 18 × 24 | 45.72 × 60.96 |
| Architectural poster | 24 × 36 | 60.96 × 91.44 |
| Custom print | 13 × 16 | 33.02 × 40.64 |
Does converting inches to cm change print quality?
No. Converting units describes the physical size; it does not add pixels or change resolution. For a sharp print, keep the intended dimensions and check the file in the 300 DPI pixel calculator before printing at actual size.
Frequently asked questions
How many centimeters is one inch?
One inch is exactly 2.54 centimeters.
What is 8.5x11 inches in centimeters?
US Letter paper is 21.59 × 27.94 cm. In landscape orientation it is 27.94 × 21.59 cm.
What is 8.5x13 inches in centimeters?
8.5 × 13 inches is 21.59 × 33.02 cm.
What is 18x24 inches in centimeters?
18 × 24 inches is 45.72 × 60.96 cm.
Should I round before printing?
Keep at least two decimal places while planning, then use the printer size that the application accepts. A small rounding difference is usually harmless, but “fit to page” can change scale more noticeably.
