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Screen Size Calculator
Screen size is quoted as a diagonal, which hides how much the actual area varies with aspect ratio: a 65 inch 16:9 panel is far larger in area than a 65 inch ultrawide. Converting to width and height also tells you the comfortable viewing distance.
How it works
Screen diagonal
Aspect ratio
Native resolution width
Width
Height
Width
Height
Screen area
Pixel density
Recommended viewing distance
Frequently asked questions
How do I use the Screen Size Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.