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Your display diagonal is:

Display dimensions, width x height:

Dimensions might be incorrect without calibration. To calibrate place a physical credit card against the image of the card below and increase or decrease its size until it matches the size of the physical card exactly. Once both have the same size the calibration is complete and you can read the display dimensions above. If you don't have physical card you can use debit card, library card or a standard ID.

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Screen size detect physical dimensions of your display in inches. Screen size is computed based on CSS 1" size in pixels and might be inaccurate for some operating systems, notably mobile devices. Most reliable way to determine physical screen size is by means of a ruler. Screen resolution on the other hand could be determined reliably by screen resolution detector.

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