Display PPI, Pixel Pitch & Aspect Ratio Calculator
Enter the display resolution and either the diagonal size or the active display width and height.
This calculator helps estimate key display specifications including aspect ratio, calculated diagonal, pixel density, pixel pitch, and active display area. It is useful when comparing LCD, OLED, touch panel, industrial display, and embedded display options.
How to use the calculator
Enter resolution width and height in pixels. With Diagonal Size, enter the active diagonal in inches and choose the physical aspect ratio. With Active Width / Height, enter the active image dimensions in millimeters or inches. Do not use the outside dimensions of the module, bezel, or enclosure.
Worked example: 1920 × 1080 at 15.6 inches
Select Diagonal Size, enter 1920 × 1080 pixels and 15.6 inches, and use the resolution ratio of 16:9. The result is approximately 141.21 PPI, 0.1799 mm pixel pitch, and an active area of 345.35 × 194.26 mm.
For this square-pixel example, PPI = √(1920² + 1080²) ÷ 15.6, and pixel pitch in millimeters = 25.4 ÷ PPI. Active width and height are calculated from the diagonal and aspect ratio.
Assumptions and limits
The example assumes square pixels. The tool reports a diagonal-based pixel density; if the physical and resolution aspect ratios differ, horizontal and vertical pixel pitch may differ. Check the source dimensions and manufacturer data before using the result for component selection or fit decisions.
Worked example checked September 21, 2026 against the displayed result and an independent calculation.
Use display geometry in your integration plan
Compare candidate displays using their active image dimensions, then review the enclosure, bezel, interface, and mounting requirements separately. A matching pixel count or diagonal does not establish mechanical or electrical compatibility.