Image DPI / Print Size Calculator
Calculates print size in inches or centimetres from image pixel dimensions and DPI, plus megapixels.
Enter Values
How to use this calculator
- Enter the image width and height in pixels and your target DPI.
- Read the print size in inches and centimetres.
How it works
Print size = pixels ÷ DPI. 300 DPI is the usual target for sharp photo prints; large posters viewed from afar can use 150 DPI or less.
Worked example
3000 × 2000 px at 300 DPI. = 10 × 6.67 in (about 25.4 × 16.9 cm).
Tips
- Runs in your browser. Your inputs are not saved or transmitted.
Frequently asked questions
What DPI do I need?
~300 DPI for photos and small prints; 150 DPI is often fine for large posters.
Privacy?
Runs in your browser; nothing is uploaded.
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Cite this tool
Zerdly. (2026). Image DPI / Print Size Calculator. Retrieved from https://www.zerdly.com/tools/image-dpi-calculator/
Tip: Enter any known values to calculate the remaining results.
Designed to run locally in your browser. Tool inputs are not intentionally stored by Zerdly unless stated otherwise.