ScreenPPI
Calculate PPI

Pixels · inches · millimeters

Turn resolution and diagonal into real screen geometry.

ScreenPPI calculates density, pitch, px/cm, aspect ratio and panel dimensions from explicit values — entirely in your browser.

Open PPI calculator

No account, device scan, upload, backend or result URL.

Three explicit inputs

Describe the pixel grid and physical scale

01

Enter native width and height

Use whole active pixel dimensions.

02

Enter visible diagonal

Choose inches or centimeters.

03

Read equivalent geometry

PPI, px/cm, pitch and size update together.

Neutral screen arithmetic

Useful when specifications use different units

  • Compare published monitor dimensions.
  • Convert PPI to px/cm or millimeter pitch.
  • Find panel width and height from diagonal.
  • Verify aspect-ratio arithmetic.

Worked tuples

Check 27-inch QHD and 31.5-inch 3840×2160

Executable examples use the calculator’s formulas and six-place display rounding.
View examples

Resolution · diagonal · density

Calculate screen geometry from explicit inputs

Enter native pixel dimensions and the visible panel diagonal to get PPI, pitch and physical size.

Open ScreenPPI