Calculadora de PPI (Pixels por Polegada)

The PPI (Pixels Per Inch) Calculator determines the pixel density of a screen or digital image. PPI indicates how many pixels are contained in one linear inch of the display, a crucial parameter for assessing the sharpness of monitors, smartphones, tablets, and prints. Higher PPI means more detailed and smoother images, especially at close viewing distances.

The calculation uses the formula PPI = √(width_pixels² + height_pixels²) / diagonal_inches. First, compute the diagonal resolution in pixels (Pythagorean theorem) and then divide by the diagonal size of the screen in inches. For example, a Full HD (1920x1080) 24-inch screen has PPI ≈ √(1920² + 1080²) / 24 ≈ 91.8 PPI.

This tool is useful when comparing devices, choosing a monitor for photo editing or graphic design, or planning high-quality prints. Knowing the PPI helps understand if the screen is suitable for detailed work or if the print will have sufficient resolution for the desired size. The term DPI (dots per inch) is often used for printing, but the concept is analogous.

Cautions: the calculated PPI is theoretical and may vary with device calibration. For printing, 300 PPI is generally the standard for photographic quality. On screens, values above 300 PPI are considered excellent for close use. Remember that perceived sharpness also depends on viewing distance and the user's visual acuity.