Video Bitrate Calculator

Determine the necessary average video bitrate to fit a specific video duration into a target file size. Audio overhead is accounted for.

JavaScript Required: This calculator relies on client-side JavaScript to perform calculations instantly without server roundtrips. The math formula is: Bitrate (kbps) = (Target Size in KB * 8) / Duration in seconds - Audio Bitrate.

Target File Size (MB)

Video Duration (Minutes)

Audio Bitrate (kbps)

Target Video Bitrate

Assumptions: 1 MB = 1024 KB. 1 Byte = 8 bits. Calculation assumes constant bitrate (CBR) or target average bitrate (VBR). Container overhead (usually ~1-2%) is not factored in.