Production & signals
Video File Size Calculator
Estimate binary file size from bitrate and duration.
Use the encoded bitrate and duration, then allow for container metadata and platform processing.
What the result means
The result is an estimate in mebibytes using binary conversion. Actual files vary with codec, variable bitrate, audio, and metadata.
The formula
Bitrate Mbps * 1,000,000 * duration seconds / 8 / 1,048,576
Results are displayed to at most two decimal places. Calculations use the unrounded inputs.
A worked example
Put the formula to work
- Bitrate (megabits per second)
- 10
- Duration (seconds)
- 60
Estimated file size: 71.53
Ten Mbps for sixty seconds is approximately 71.53 MiB before container overhead.
How to use this calculator
- Read the encoder's average bitrate.
- Enter the exact duration.
- Convert bits to bytes and seconds to total size.
- Leave upload headroom for overhead and platform limits.
Why this number matters
File-size planning can identify upload and storage constraints before a render is delivered.
Input definitions
- Bitrate (megabits per second)
- Average encoded bitrate.
- Duration (seconds)
- Video duration.
Assumptions and limitations
- Variable bitrate output can differ materially.
- Audio and metadata may add size; estimates are not guaranteed upload sizes.
Methodology
The default result and worked example use the same calculation functions as the interactive tool. The formula cannot verify the quality or scope of your source data.
Read our calculation methodology
Last updated .