Method
bits = (video Mbps + audio Mbps) × seconds; bytes = bits/8.
Video size by bitrate
Convert bitrate and duration into approximate video file size.
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Inputs
Change assumptions
How to use it
Use the result as a transparent planning estimate. Change one assumption at a time, compare scenarios and move to Toolkit when you need system-level simulation.
Limits
VBR fluctuates; container and metadata add overhead.
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Local by design
Your inputs are processed in this browser. This utility does not need an account, database or AI API.