Resolution calculator

Calculate megapixels, aspect ratio and optional pixel density.

Runs on your device Works offline after setup All Utilities

Width (pixels)

Height (pixels)

Diagonal (inches, optional)

Enter your values, then choose Calculate.

Limits

Positive whole-number pixel dimensions with a safe integer pixel count. PPI needs a diagonal in inches. Approximate real-number outputs use 12 significant digits unless a unit specifies otherwise.
Desktop limits are provisional. Physical mobile and Safari verification remains open.

What happens to your data

Resolution calculator runs inside this browser tab, and the page's code comes from this site. There is no application server to receive your data, and the site's security policy limits connections to this site.

How local processing works

Good to know

Positive whole-number pixel dimensions with a safe integer pixel count. PPI needs a diagonal in inches. Approximate real-number outputs use 12 significant digits unless a unit specifies otherwise.
Desktop limits are provisional. Physical mobile and Safari verification remains open.