Pixels to Inches Converter Formula

Understand the math behind the pixels to inches converter. Each variable explained with a worked example.

Use the Pixels to Inches Converter

Formulas Used

Inches

inches = dpi > 0 ? pixels / dpi : 0

Centimeters

cm = dpi > 0 ? pixels / dpi * 2.54 : 0

Millimeters

mm = dpi > 0 ? pixels / dpi * 25.4 : 0

Variables

VariableDescriptionDefault
pixelsPixels(px)300
dpiResolution (DPI)(DPI)96

How It Works

Pixels to Physical Size

Inches = Pixels / DPI (Dots Per Inch)

Common DPI Values

ContextTypical DPI Screen (standard)72-96 Retina display144-220 Print (standard)150-300 High-quality print300-600

Worked Example

300 pixels at 96 DPI.

pixels = 300dpi = 96
  1. 01Inches = 300 / 96 = 3.125 inches
  2. 02Centimeters = 3.125 x 2.54 = 7.937 cm

Frequently Asked Questions

What DPI should I use?

For web/screen: 72-96 DPI. For standard printing: 150-200 DPI. For high-quality photos: 300 DPI. For large format (posters): 100-150 DPI.

What is the difference between DPI and PPI?

PPI (pixels per inch) refers to screen resolution. DPI (dots per inch) refers to print resolution. They are often used interchangeably but technically describe different things.

Ready to run the numbers?

Open Pixels to Inches Converter