Built to spec.

Reduce any width×height to its lowest-terms ratio (16:9, 4:3, 1:1) and solve for a missing width or height while keep...

Check the WCAG colour contrast ratio between two colours and see whether it passes AA or AAA for body text, large tex...

Work out a screen's pixels per inch from its resolution and diagonal — plus dot pitch, pixels per cm, megapixels and ...

Turn an advertised screen diagonal into real width, height and area — or measure a panel and get its diagonal and asp...

How far to sit from a 55, 65, 75 or 85-inch TV — and what size fits your sofa. Uses THX's 0.835 rule and the ITU-R BT...

Convert between pixel, storage and display aspect ratio for anamorphic video, and get the square-pixel resolution to ...

Turn a projector's throw ratio into a mounting distance, work out the image size from a fixed spot, or find the throw...

Work out how high to mount a TV: the bottom-edge height for eye-level viewing, and whether an over-the-fireplace posi...

Convert Hz to milliseconds per frame and back, check how much of the frame budget your renderer uses, and see the fra...

Work out the render target a given resolution scale produces, and how many pixels it actually costs. 75% render scale...