DisplayMath

About DisplayMath

DisplayMath is a free screen size calculator for anyone choosing between TVs, monitors or other displays. Users enter a resolution and diagonal, or pick a preset, and the tool works out physical width and height, pixel density and how much of their view the screen fills at a chosen viewing distance.

All displays are drawn to scale on one canvas, so the difference between, say, a 65 inch and a 75 inch TV is visible rather than guessed. Separate views cover physical size, field of view, side field of view, wall placement and distance-related measurements. The calculator also handles curved screens, OS scaling and pixels per degree, and companion pages cover what size TV to buy and mounting height.

On a supported iPhone or iPad, a display can be placed on a real wall in augmented reality at true size. The calculators run in the browser, and the site includes explanations of PPI, pixel pitch and viewing angles plus a list of popular size comparisons.