Screen PPI Table: Pixels per inch (PPI) by Horizontal resolution
Reference table of pixels per inch (ppi) for Screen PPI across a range of horizontal resolution values — exact, engine-computed figures you can read off at a glance.
Screen PPI Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Pixels per inch (PPI)
141.2
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Screen PPI Calculator
The Screen PPI Calculator works out your pixels per inch (ppi) in an instant. Enter horizontal resolution, vertical resolution and screen diagonal and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the horizontal resolution.
- Enter the vertical resolution.
- Enter the screen diagonal.
- Read off your pixels per inch (ppi) — the calculator updates automatically, with no button to press.
Formula
The Screen PPI Calculator uses the formula:
Pixels per inch (PPI) = √(Horizontal resolution ^ 2 + Vertical resolution ^ 2) ÷ Screen diagonal
Worked example
For example, with horizontal resolution of 1,920 px, vertical resolution of 1,080 px and screen diagonal of 15.6 in, the pixels per inch (ppi) is 141.2.
| Horizontal resolution | 1,920 px |
|---|---|
| Vertical resolution | 1,080 px |
| Screen diagonal | 15.6 in |
| Pixels per inch (PPI) | 141.2 |
|---|
Results are estimates for educational use, not professional advice.
Frequently asked questions
Find the diagonal in pixels with √(width² + height²), then divide by the diagonal in inches. A 1920×1080, 15.6-inch screen is about 141 PPI.
Pixels per inch measures pixel density. Higher PPI means sharper images, since pixels are smaller and harder to see individually.
Around 100–150 PPI is typical for laptops and monitors, while phones often exceed 300–400 PPI for crisp text.
They are related but different. PPI describes screen pixel density; DPI refers to printed dots per inch.
Enter the horizontal resolution. Enter the vertical resolution. Enter the screen diagonal. Read off your pixels per inch (ppi) — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Screen PPI: Formula, Steps & Examples
Learn how to calculate Screen PPI — the formula explained step by step, with worked examples and a free calculator to check your answer.