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Video File Size from Bitrate — result sheet
Estimate encoded video file size from video bitrate, audio bitrate, duration, and container overhead.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Size = (video bitrate + audio bitrate) × duration × (1 + overhead); divide bits by 8 for bytes.
For a constant-bitrate estimate, file size is total bitrate multiplied by duration. This calculator keeps video and audio rates visible, adds an explicit overhead factor, and reports decimal megabytes and gigabytes so storage planning does not silently mix prefixes.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Video bitrate — Mbps; minimum 1.0E-6; maximum 1000000
- Audio bitrate — kbps; minimum 0; maximum 1000000
- Duration — min; minimum 1.0E-6; maximum 1000000
- Container and metadata overhead — %; minimum 0; maximum 100
Worked example
| Input | Value |
|---|---|
| Video bitrate | 8 |
| Audio bitrate | 128 |
| Duration | 10 |
| Container and metadata overhead | 5 |
A 10-minute video at 8 Mbps video and 128 kbps audio is approximately 640.08 MB with 5% overhead.
Assumptions and limits
- Bitrates are average encoded rates and duration is converted to seconds.
- The overhead field covers container metadata and small rate variation; variable-bitrate encoders can produce a different result.
- Codec efficiency, keyframes, subtitles, thumbnails, multiple audio tracks, and filesystem allocation are not inferred.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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