PPI Calculator
Calculate the pixel density of a screen from its resolution and diagonal size. Enter width, height and screen diagonal to see pixels per inch when…
8 of 8 free uses remaining today
Calculate the pixel density of a screen from its resolution and diagonal size. Enter width, height and screen diagonal to see pixels per inch when you calculate.
Worked example
Example calculated from the starting values. Enter your own values and press Calculate to get your result.
With the default inputs (width = 2,560 px, height = 1,440 px, screen diagonal = 27 in), the results are: pixels per inch 108.8 ppi.
Quick reference: width vs result
Reference table based on the example values; it is not your calculation result.
| Width (px) | Pixels per inch |
|---|---|
| 1,280 | 71.4 ppi |
| 2,560 | 108.8 ppi |
| 5,120 | 197.0 ppi |
| 12,800 | 477.1 ppi |
| 25,600 | 949.6 ppi |
| 51,200 | 1,897.0 ppi |
Frequently asked questions
What formula does this calculator use?
Pixels per inch = sqrt(w^2+h^2) ÷ d. Variables: w = width in px, h = height in px, d = screen diagonal in in.
What do I need to enter?
You need width (px), height (px), screen diagonal (in). Results update as you type.
What is an example result?
With the default inputs (width = 2,560 px, height = 1,440 px, screen diagonal = 27 in), the results are: pixels per inch 108.8 ppi.
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