Photo Print Size Calculator
Calculate maximum print size from your camera's megapixels at 150, 300, and 600 DPI quality levels.
Enter megapixels and aspect ratio to see max print sizes at different quality levels.
Print size depends on your camera’s megapixels and the DPI (dots per inch).
The formula:
- Total pixels = Megapixels × 1,000,000
- Width (pixels) = sqrt(Total pixels × Aspect ratio)
- Print width (inches) = Width pixels / DPI
- Print width (cm) = Print width (inches) × 2.54
Standard camera aspect ratios:
- 3:2 — Most DSLRs and mirrorless cameras
- 4:3 — Most smartphones and compact cameras
- 16:9 — Video mode
- 1:1 — Square format
Print quality guidelines:
| DPI | Quality | Best for |
|---|---|---|
| 150 | Acceptable | Large posters viewed far away |
| 300 | High quality | Photos, magazines, brochures |
| 600 | Professional | Fine art, close inspection |
Common camera resolutions:
| Megapixels | Max print at 300 DPI (3:2) |
|---|---|
| 8 MP | 8.1 × 12.2 in (20.6 × 31.0 cm) |
| 12 MP | 9.9 × 14.9 in (25.2 × 37.8 cm) |
| 24 MP | 14.0 × 21.1 in (35.6 × 53.5 cm) |
| 48 MP | 19.8 × 29.8 in (50.3 × 75.6 cm) |