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Phone, scan and video files to print size
Any image file reaches a listed print size when its shorter side has at least 100 pixels for every inch of the print's shorter side and its longer side matches. This set applies that one rule to eight kinds of source: phone cameras by resolution, iPhone modes, zoom, scans of prints and film, video frames and screenshots.
Eight pages, one rule
| Page | What it works out |
|---|---|
| Phone camera resolution to print size | Nine resolutions, 34 sizes, CSV and JSON |
| 12 MP phone photos | Crops to 3:2, 16:9 and 1:1 |
| 48 to 200 MP phone photos | Source rows for 18 phones and the binned-mode trap |
| iPhone photo print size | 12, 24, 48 MP and the 63 MP panorama cap |
| Phone zoom and print size | Crop factor allowed per listed size |
| Scan old prints to print size | 300, 600 and interpolated 1200 dpi scans |
| Scan film and slides to print size | 35 mm, 120 and 4 x 5 in film |
| Print a video frame or screenshot | 1080p, 4K, 8K and phone screens |
The rule in one line
Pixels needed = print inches x 100. For 12 x 18 in that is 1,200 x 1,800 pixels; for 30 x 40 in it is 3,000 x 4,000. A 12 MP phone photo (about 4,000 x 3,000) meets the second and not the 36 x 48 in size, which needs 4,800 pixels on the long side.
Where each source typically lands
| Source | Typical pixels | Largest listed size at 100 ppi |
|---|---|---|
| 12 MP phone photo | 4,000 x 3,000 | 30 x 40 in |
| 48 MP phone photo | 8,000 x 6,000 | 48 x 60 in |
| 4 x 6 in print scanned at 600 dpi | 2,400 x 3,600 | 24 x 36 in |
| 35 mm frame scanned at 4800 dpi | 4,535 x 6,803 | 40 x 60 in |
| 4K video frame | 3,840 x 2,160 | 18 x 36 in |
Megapixel and frame figures come from the sources listed on each page; the pixel sizes shown are computed from them. The existing largest print size table and effective pixels per inch table use generic photo sizes; these pages start from the device or the original.
The 100 ppi rule and listed sizes are the ArtzFolio Studio table (custom.artzfolio.com/data/pixels-100ppi.csv). Each linked page cites its own sources, fetched and read on 2026-11-13.