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iPhone photo print size

An iPhone 13 photo (12 MP, about 4000 x 3000) reaches 31 of the 34 listed sizes, up to 30 x 40 in. The 24 MP mode on the iPhone 16 and 17 reaches 32 sizes, up to 36 x 48 in, and the 48 MP mode reaches all 34, with 125 ppi at 48 x 60 in.

24 x 36 needs 8.6 MP36 x 48 needs 17.3 MP48 x 60 needs 28.8 MP12 MP (iPhone 13 cameras)12.0 MP24 MP mode24.0 MP48 MP mode48.0 MPBar length follows the square root of megapixels. Dashed lines: pixels each size needs at 100 per inch.

iPhone modes against 24 x 36, 36 x 48 and 48 x 60 in. Only the 48 MP bar passes the 48 x 60 line.

What Apple's pages list

ModelCamerasModesSource
iPhone 13Dual 12MP system: Main and Ultra Wide-Apple page
iPhone 1648MP Fusion Main; 12MP Ultra Wide24MP and 48MP on the main camera; 12MP 2x Telephoto 'also enabled'Apple page
iPhone 1748MP Fusion Main; 48MP Fusion Ultra Wide24MP and 48MP on both; 12MP optical-quality 2x telephotoApple page

All three pages also list a panorama of up to 63MP. Apple's pages give megapixels only, not file sizes in pixels.

Each mode against the listed sizes

ModePixels (computed)MPListed sizes reachedLargest size reachedppi at 12 x 18ppi at 24 x 36ppi at 48 x 60
12 MP4,000 x 3,00012.031 of 3430 x 40 in22211162
24 MP mode5,656 x 4,24224.032 of 3436 x 48 in31415788
48 MP mode8,000 x 6,00048.034 of 3448 x 60 in444222125

For the 24 MP mode, 40 x 60 and 48 x 60 in fall short: 5,656 / 60 = 94 ppi on the long side and 4,242 / 48 = 88 ppi on the short side of the 48 x 60 print.

Panorama: up to 63 MP, shape not stated

Apple states a cap of 63MP, not the width or height. The table assumes three panorama shapes and asks how much of each reaches the three listed 2:1 sizes (12 x 24, 15 x 30, 18 x 36 in). These are assumptions, not Apple figures; your own file's width and height replace them.

Assumed shapePixels at 63 MPppi at 12 x 24ppi at 15 x 30ppi at 18 x 36Share of frame used at 18 x 36
2:111,224 x 5,612468374312100%
3:113,747 x 4,58238230525567%
4:115,874 x 3,96833126522050%

At 3:1 and 4:1 the extra width is cropped away when the print is 2:1, which is why the share of frame used falls.

Zoom

Apple lists 2x optical zoom out and digital zoom up to 5x on the iPhone 13 page and up to 10x on the iPhone 16 and 17 pages. Digital zoom uses the middle of the frame, so a 2x digital zoom on a 12 MP photo is 3 MP of sensor pixels (see phone zoom and print size). On the 48 MP main camera, Apple's own '12MP 2x Telephoto' matches the arithmetic: 48 / (2 x 2) = 12.

Apple gives megapixels, so the pixel sizes above are computed at 4:3; a real file differs slightly.

Sources

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