From pixels
to real sizes.
Find an image’s physical size or the pixels you need. Choose centimetres or inches and a PPI resolution.
The calculated size
25.4 × 16.93 cm
300 PPI
inches = pixels ÷ PPI
This calculates dimensions, not sharpness or print quality. Changing PPI without resampling adds no detail.
Understand PPI and DPI →Check a printed size
A planned 100 mm line printed at 95 mm is at 95% scale. Check the viewer’s scaling settings first.
How the calculation works
One inch is exactly 2.54 cm. Pixels ÷ PPI gives inches. Multiply by 2.54 for centimetres.
The reverse calculation rounds up to whole pixels to meet the target resolution.
What you need to check
Suitable resolution depends on content, size, viewing distance and the print process. 300 PPI is an example, not a guarantee. Keep your image proportions.
The calculator does not crop, stretch or process files.
Check the size on paper →