PPI Calculator
How to calculate pixel density
- Enter the screen resolution in pixels, width and height.
- Enter the diagonal size of the screen in inches or centimeters.
- The pixels per inch appear with the dot pitch, the physical size of the screen and its aspect ratio.
Frequently asked questions
What is the formula?
PPI = √(width² + height²) ÷ diagonal in inches: the number of pixels along the diagonal divided by its length. A 24-inch 1920 × 1080 monitor has about 92 PPI.
Is PPI the same as DPI?
They are often used for the same thing, but PPI counts the pixels on a screen and DPI counts the ink dots a printer lays down.
More engineering calculators
Ohm's Law CalculatorResistor Color Code CalculatorVoltage Divider CalculatorLED Resistor CalculatorSeries and Parallel CalculatorVoltage Drop CalculatorWire Gauge ChartBattery Life Calculator555 Timer CalculatorTorque CalculatorGear Ratio CalculatorPulley and Belt CalculatorBeam Deflection CalculatorConcrete CalculatorRebar CalculatorBoard Feet CalculatorPaint CalculatorFlooring CalculatorRoof Pitch CalculatorPipe Flow CalculatorReynolds Number CalculatorHeat Loss CalculatorBTU CalculatorSignificant Figures CalculatorScientific Notation ConverterEngineering Notation ConverterTolerance Stack-Up CalculatorScrew Thread ChartSubnet CalculatorNumber Base ConverterDownload Time CalculatorAspect Ratio CalculatorCable Size CalculatorCutting Speed CalculatorRoof Area Calculator