The short version
Multiply desired print width and height in inches by the target pixels per inch. An 8 × 10 inch print at 300 PPI needs 2400 × 3000 pixels.
What matters most
- PPI connects a digital pixel grid to physical print size.
- 300 PPI is a common close-view target, not a universal requirement.
- Large prints viewed farther away can look good at lower density.
How to apply it
- Get the source pixel dimensions.
- Choose final print inches and realistic viewing distance.
- Divide pixels by inches to find available PPI, or multiply inches by PPI for required pixels.
- Soft-proof, sharpen for output and follow the print provider's instructions.
Reference table
| Pixels at 300 PPI | Pixels at 240 PPI | |
|---|---|---|
| 4 × 6 in | 1200 × 1800 | 960 × 1440 |
| 5 × 7 in | 1500 × 2100 | 1200 × 1680 |
| 8 × 10 in | 2400 × 3000 | 1920 × 2400 |
| 12 × 18 in | 3600 × 5400 | 2880 × 4320 |
Use exact dimensions and units in production notes; familiar labels can describe more than one standard.
Common mistakes to avoid
- Changing only the DPI tag and assuming pixels were added.
- Ignoring crop differences between source and paper ratios.
- Applying screen sharpening without checking a print proof.
Continue with the right tool
Use a calculator to check the numbers against your own source and destination instead of relying on a generic preset.
Related guides
DPI vs PPI: The Difference for Images, Screens and Printing
Understand DPI versus PPI, which value belongs in image calculations and why changing metadata alone does not add detail.
Print and densityWhat Is DPI? Printer Resolution Without the Common Myths
Learn what dots per inch means for printers, how it differs from image pixels and why a DPI metadata value alone does not change quality.
Print and densityWhat Is PPI? Pixels per Inch Explained for Screens and Prints
Understand pixels per inch, calculate print density and distinguish image PPI from screen pixel density and printer DPI.
Frequently asked questions
Is 300 PPI always necessary?
No. It is a useful high-quality target for close viewing, but printer process, subject and distance matter.
What if my image has fewer pixels?
Use a smaller print, accept lower density or carefully upscale and inspect a test print.
Should I use DPI or PPI for image math?
Use PPI for pixels mapped to inches; printers use DPI for their physical dot placement.