Calculate your display's pixel density (PPI) using its dimensions and pixel count. Learn about PPI and DPI definitions, and how to categorize screen resolution.
PPI Calc - DPI Calculator by AppNextDoor Labs
for displays with square pixel




248+ iOS apps curated and reviewed
PPI Calc is the household name in ppl calc, but it's far from the only option. We track 248+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 | Free was $0.99 | 4.5★ (66) | No | No | Aug 2026 | |
| 2 | Free | 4.3★ (3) | No | No | Jul 2026 | |
| 3 | Free | 3.2★ (6) | No | No | Aug 2026 | |
| 4 | Free | 4.3★ (12) | No | No | Aug 2026 | |
| 5 | Free | — | No | No | Jul 2026 | |
| 6 | Free | — | Yes | No | May 2026 | |
| 7 | Free was $0.99 | — | No | Yes | Aug 2026 | |
| 8 | Free | — | No | No | Jul 2026 |





Calculate your display's pixel density (PPI) using its dimensions and pixel count. Learn about PPI and DPI definitions, and how to categorize screen resolution.

Calculate display settings like DPI and PPI using only screen resolution and diagonal measurements. This straightforward utility tool provides essential display information.

Easily calculate the Pixels Per Inch (PPI) for any screen, from phones to monitors. Input screen dimensions and diagonal size to get an instant PPI result and determine if it qualifies as a Retina Display. You can also search for device information online and save your calculations.


Calculate pixels per inch (PPI) for any screen, along with aspect ratio and screen measurements. View data in inches or centimeters. Includes presets for standard resolutions and common devices.


















This calculator app clearly displays inputs and sums on separate rows for easy understanding. Perform basic arithmetic operations with large, accessible buttons. Customize decimal places and rounding for precise calculations.


This app offers a modern computing experience with textbook formulas, custom functions, and dynamic calculations. It allows for flexible customization of variables and functions on a free canvas, with file archiving capabilities.




This math tool helps you solve right triangle problems by calculating the hypotenuse or other sides with detailed, step-by-step visual solutions. It's designed for easy input of two side lengths to find the third, making algebra and geometry calculations straightforward.







