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Work out pixels per inch, screen width and height, aspect ratio and the distance where pixels blend, for any phone, laptop, monitor or TV.
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Useful to know
What does this tool establish?
Uses square pixels and the entered diagonal. Physical size is calculated, never inferred from browser screen values. Comparison rectangles show relative size, not life-size centimetres.
Does this certify the screen?
No. Browser signals, calculations and visual observations cannot certify physical panel specifications or defects.
Where are my files and inputs processed?
Calculations and observations stay in this tab. Optional observation saving starts off and uses only this device. Turn it off or use Clear observation to remove that saved note. Downloaded reports remain on your device.
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