DPI / PPI Calculator
Calculate effective PPI from pixels and physical size, or required pixels from a target print size and quality level.
DPI / PPI result
2480px across 210mm equals 300 PPI. At 300 PPI, 210mm needs 2480px.
- Quality at effective PPI: Acceptable
- Formula: PPI = pixels / inches. Rewriting the DPI tag alone does not add real pixels.
| PPI | Required pixels for 210mm |
|---|---|
| 72 | 595px |
| 96 | 794px |
| 150 | 1240px |
| 200 | 1654px |
| 300 | 2480px |
| 600 | 4961px |
How to use this result
Start with the target surface: a printed size, a platform canvas, a marketplace image requirement, or a safe-zone overlay. Enter the real pixel dimensions or upload a local image when the tool supports it, then compare the result with the recommended size, ratio, file-size limit, and source note.
Use the copied output as a production checklist rather than as an approval guarantee. The calculator checks measurable dimensions and ratios, while final acceptance can still depend on compression, color, account settings, crop previews, platform policy, or printer-specific export instructions.
FAQ
Does changing DPI improve quality?
No. It changes print interpretation unless you also add real pixels through resampling.
Are DPI and PPI identical?
For this planning tool, PPI is effective pixel density for print sizing.
Related tools
Sources and limits
Print formulas use standard inch, cm, mm and PPI conversions. Last checked 2026-05-24.
Platform dimensions are centralized in data files. Every platform spec must include sourceConfidence, sourceUrl and lastCheckedAt. Official platform documentation overrides this tool when specifications differ.