How big can I print a phone photo?

By Osmanth Image · Updated October 13, 2026

It depends on the photo's pixel size, not the phone. A 4,032 × 3,024 px photo, about 12 megapixels, gives 378 pixels per inch at 8×10 in and 168 at 18×24 in, which our check rates "plenty" and "enough". At 24×36 in it falls to 112, which suits normal viewing distance only.

The short version

• A photo's megapixels are its width in pixels times its height in pixels, divided by a million. 4,032 × 3,024 is about 12.2 megapixels.
• Pixels per inch (PPI) = pixels across ÷ inches across the print. The bigger the print, the fewer pixels cover each inch.
• The same photo is "plenty" at a small size and only "normal viewing distance" at a large one. The size, not the file, changes the verdict.
• A photo whose shape does not match the print size is trimmed to fill it. That uses fewer pixels, and the check shows how much is trimmed.
• A print service can ask for more than our guideline. Printful states at least 300 DPI for its posters.

Three photo sizes at nine print sizes

The three pixel sizes below are examples, not claims about any particular phone. Each cell is the pixels per inch the photo gives at that print size, then the check's verdict in a word. "Plenty" is "Plenty of detail for this size." "Enough" is "Enough detail for this size." "Normal distance" is "Enough detail at normal viewing distance, but it won't be tack-sharp up close." "Not quite" is "Not quite enough detail for this size — it may look soft or pixelated."

The verdict depends on the size as well as the number. Small prints are looked at up close, so they need more pixels per inch to earn the same word. A 24×36 in poster is seen from further away, so 112 pixels per inch can still read as normal viewing distance, while 136 at 18×24 in is the same verdict at a smaller size.

What we tested

We ran the three pixel sizes through the check at each of the nine sizes. All three have the same 4:3 shape, so the trimming does not change between them: about 11% at 4×6, 12×18 and 24×36 in, about 6% at 8×10 in and the A sizes, about 5% at 5×7 and 11×14 in, and nothing at 18×24 in. The photos are landscape, and the check turns the paper to match.

Compared with Printful's poster rule of at least 300 DPI, the picture changes. An 18×24 in poster at 300 pixels per inch needs 5,400 × 7,200 pixels, about 38.9 million. The 12 megapixel photo has 12.2 million and reaches 168 pixels per inch at that size. The 48 megapixel photo reaches 333 and meets it.

How to find your photo's pixel size

1. Choose the file in the check. Its width and height in pixels appear in Step 1.
2. Pick the print size. The report shows the pixels per inch, the verdict, and how much the photo is trimmed.
3. If the result is too low, try a smaller size. The report shows how large the photo prints well. Compare the file you will actually send to the printer, because a copy that was resized on the way will have fewer pixels.

For the pixel counts of common poster sizes, see poster size in pixels. To see what trimming does to a photo at 8×10 in, see why an 8×10 print cuts off your photo.

Limits and what we are unsure of

• The three pixel sizes are examples. A phone's real file may be smaller or larger, and we do not know what any given phone saves.
• The verdict words and the pixels-per-inch targets are our guideline for judging a print. They are not a printer's requirement. Printful states at least 300 DPI for its poster product, and Printify recommends 300 DPI for JPEG and PNG files while saying a lower resolution may be enough depending on the product.
• The check measures pixels and, for a JPEG, estimates how heavily it was compressed. It does not measure blur, so a soft photo can pass it. The example files here have no picture, so the compression estimate is not part of these numbers.
• Paper, ink and lighting change how a print looks. We do not model them.

The check runs on your device and your image is not uploaded; the privacy page explains exactly what that means.