Video File Size Calculator
Estimate the approximate size of a video from its duration and combined video/audio bitrate.
Estimated file size38.5 MBApproximate size before container overhead and variable-rate differences.
How the estimate works
At a constant average bitrate, file size is mostly bitrate multiplied by duration. This calculator combines the video and audio bitrates, converts the result from bits to bytes, and reports an approximate megabyte value.
Why real files can differ
Containers add overhead, variable-bitrate encoders spend more data on difficult scenes, and metadata also takes a small amount of space. Use the result for planning rather than as an exact promise.
Need the reverse calculation?Use the video bitrate calculator to estimate a bitrate for a target file size.