Print size guide
300 DPI Print Size: Convert Pixels to Inches and CM
People often say 300 DPI when they mean 300 PPI for image print size. This guide explains the conversion and shows common examples.
Quick answer
At 300 PPI, print size in inches equals pixels divided by 300. A 3000 x 2400 image prints at 10 x 8 inches, or 25.4 x 20.32 cm.
DPI vs PPI
For image sizing, PPI is the useful number: it means how many image pixels are placed in one printed inch. DPI technically describes printer ink dots, but many print shops use DPI informally for requested image density.
When a service asks for 300 DPI artwork, the practical requirement is usually that your pixel dimensions support the final physical size at about 300 pixels per inch.
How to use the formula
Divide the pixel width by 300 to get print width in inches. Divide the pixel height by 300 to get print height in inches. Multiply inches by 2.54 to convert to centimeters.
If you print larger than the 300 PPI size, the effective PPI drops. That can still be acceptable for posters viewed from farther away.
Common 300 PPI print sizes
| Print size | Pixels needed at 300 PPI |
|---|---|
| 4 x 6 in | 1200 x 1800 px |
| 5 x 7 in | 1500 x 2100 px |
| 8 x 10 in | 2400 x 3000 px |
| A4 | 2480 x 3508 px |
| 11 x 14 in | 3300 x 4200 px |
Frequently asked questions
Is 300 DPI always required?
No. It is a strong standard for close-viewed photo prints, but 240 or 150 PPI can work for larger prints viewed farther away.
How do I convert pixels to inches at 300 DPI?
Divide each pixel dimension by 300. For centimeters, multiply the inch result by 2.54.
Can I upscale a small image?
You can upscale, but it cannot restore real missing detail. Check the effective PPI and inspect the result before production.