Estimate video file size in MB/GB from video bitrate, audio bitrate and duration.
Results are for information and preliminary estimation. For critical technical work, manufacturer data, local codes and qualified professional review take precedence.
Total bitrate ≈ video + audio. File bytes ≈ bitrate (bit/s) × duration / 8. Container overhead and variable bitrate can alter the real result.
Example: 20 Mbps video + 0.3 Mbps audio for 60 minutes is roughly 9 GB.
Computer and network tools provide practical capacity planning. Vendor limits, protocol overhead, codecs and real connection quality can move results away from theoretical values.
Variable bitrate changes with scene complexity, so use the average bitrate.
At the same bitrate, theoretical size is similar; codecs mainly change bitrate required for a given quality.
Tell us if a calculation is unclear, incomplete or appears incorrect.