DPI → Pixels
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
pol × DPI
About this calculator
The DPI → Pixels calculator determines the pixel resolution of an image or screen based on its size in inches and dots per inch (DPI) density. Simply input the width or height in inches along with the DPI value to obtain the result. It is useful for adjusting digital graphics, preparing images for printing, or calculating the clarity of displays on devices like monitors or smartphones.
The formula used is straightforward: Pixels = Inches × DPI. For example, a 3-inch screen with a 100 DPI density will have 300 pixels. This means each inch of the screen contains 100 points (pixels), and the multiplication gives the total pixels in the specified dimension. The calculation assumes the input is in inches, not centimeters, which is crucial for accuracy.
It is applied in scenarios like scaling logos for banners, setting photo resolution for printing, or analyzing video display quality. However, note that the actual density of a screen may vary due to manufacturing factors, such as curvature or pixel spacing. Always check the technical specifications of the device to ensure precise results.
Frequently asked questions
What is DPI?
DPI (Dots Per Inch) is a measure of dot density per inch, indicating the quality and clarity of printed or displayed images.
How does the calculator handle diagonal screens?
The calculator assumes a linear dimension (width or height). For diagonal screens, the calculation involves the Pythagorean theorem, which is not included here.
Can I use centimeters instead of inches?
No, the formula requires inches. To use centimeters, convert to inches first (1 inch = 2.54 cm).
Is the result always accurate?
The calculation is theoretical. Actual pixel density in devices may vary due to physical or manufacturing factors.