How it works
PPI = √(width² + height²) ÷ physical diagonal
Input definitions
- Width (px)
- Enter the value in the labeled unit.
- Height (px)
- Enter the value in the labeled unit.
- Diagonal (inches)
- Enter the value in the labeled unit.
A worked example
- Width (px)
- 1920
- Height (px)
- 1080
- Diagonal (inches)
- 24
91.7877987534291
Assumptions & limits
Uses the stated input units. Results are rounded for display; keep additional precision for subsequent calculations.
Sources & review
Maintained by AnsRio. Methods and examples use automated checks; this does not imply independent professional certification.
Method updated 2026-10-17. Content checked against the stated method and examples. Our verification approach.
Common questions
Can I check the result before using it?
Compare the worked example with your inputs and use the stated method: PPI = √(width² + height²) ÷ physical diagonal. Confirm input units and boundary choices before relying on the result.
How does the Pixel density tool work?
PPI = √(width² + height²) ÷ physical diagonal.
What are the assumptions and limits of Pixel density?
Uses the stated input units. Results are rounded for display; keep additional precision for subsequent calculations.