DPI Calculator
Calculate screen DPI (dots per inch) from resolution and diagonal size.
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After using DPI Calculator, continue with Color Contrast Calculator.
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Tool guide
DPI Calculator: how it works
Practical information to understand the result and use this tool correctly.
About DPI Calculator
Calculate screen DPI (dots per inch) from resolution and diagonal size.
The tool runs directly in the browser for immediate results.
How to use it
- 1Enter the values you want to calculate or process.
- 2The result updates instantly on the same page.
- 3Copy, share, or export the result if the tool allows it.
Frequently asked questions
- Do I need to sign up?
- No. The tool works without an account.
- Are my data uploaded?
- Compatible operations run locally in the browser.
- What is DPI?
- Dots (or pixels) per inch measures pixel density of a display.
- Formula?
- DPI = √(width² + height²) / diagonal_inches.