Free Video Tools

These calculators do the arithmetic that video work keeps asking for. Each shows its formula, a worked example and the published sources behind its numbers, and runs entirely in your browser.

Work out how much disk space footage needs, or what bitrate hits a target size, with the video file size calculator. Resize a frame, find a clip’s ratio and see the bars or crop in a vertical frame with the aspect ratio calculator. Convert between frame counts and timecode, including 29.97 drop-frame, with the timecode calculator.

To see who runs the site and how it works, visit the about page. The tools only calculate. They do not recommend or compare conversion software.