THE CLEVER NETWORKCleverDocuAVAILABLE NOWwww.cleverdocu.deCleverStudiIN DEVELOPMENTwww.cleverstudi.de
Translate pageChoose language
Back to all calculators

Technology & digital

Screen PPI calculator

Screen PPI calculator: Measure the visible screen, not the casing.

Your result

Complete the fields and calculate.

Calculation method and formula

square root(Horizontal pixels [px]² + Vertical pixels [px]²) ÷ Screen diagonal [Zoll]

Understand the inputs

Horizontal pixels
Unit: px. Minimum 1. Whole number.
Vertical pixels
Unit: px. Minimum 1. Whole number.
Screen diagonal
Unit: Zoll. Minimum 0.01. Use a measured value or your own assumption.

Assumptions and limitations

Measure the visible screen, not the casing. The diagonal uses Pythagoras; PPI means pixels per inch and is not by itself perceived image quality.

The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation.

Worked example

Illustrative values. Replace them with your own inputs for your calculation.

Horizontal pixels
2560 px
Vertical pixels
1440 px
Screen diagonal
27 Zoll
Example result108.8 PPI

PPI is the pixel density along the screen diagonal.

Model revision: October 17, 2026 · How CleverCalc works

FAQ

Frequently asked questions

How does Screen PPI calculator work?+

square root(Horizontal pixels [px]² + Vertical pixels [px]²) ÷ Screen diagonal [Zoll]. Measure the visible screen, not the casing. The diagonal uses Pythagoras; PPI means pixels per inch and is not by itself perceived image quality.

What assumptions should I consider for this result?+

Measure the visible screen, not the casing. The diagonal uses Pythagoras; PPI means pixels per inch and is not by itself perceived image quality. The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation.

How accurate is the result?+

The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation. Prices, measurements and model assumptions determine how well the result represents your situation.

Is this calculator free?+

Yes. Calculations and PDF export work without an account or registration.

What happens to my inputs?+

Calculations run in your browser. Results are saved locally only when you add them to My results; favourites and history are also local. Shared links contain your values. The currency tool requests the selected currencies from its rate provider without sending your amount.

Toolbox

Related calculators

Technology & digital

Download time calculator

Open

Technology & digital

Upload time calculator

Open

Technology & digital

Mbps ↔ MB/s converter

Open

Technology & digital

Streaming data usage calculator

Open
Related document on CleverDocuFree document templates and practical PDF tools – directly in your browser with no sign-up.