Video File Size Calculator
Calculate video file size from technical measurements.
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What this tool does
Calculate video file size from technical measurements. Constant bitrate estimate; include combined audio/video bitrate where relevant. Container overhead excluded.
How to use the Video File Size Calculator
- Enter or select bitrate (mbps).
- Enter or select duration (seconds).
- Read the calculated result; change any measurement to compare alternatives.
Formula
decimal GB=bitrate(Mbps)×seconds/8000
- bitrate
- Bitrate (Mbps)
- seconds
- Duration (seconds)
Constant bitrate estimate; include combined audio/video bitrate where relevant. Container overhead excluded.
Worked example
For video file size calculator, the following measurements illustrate the exact method: Bitrate (Mbps): 20; Duration (seconds): 600.
Inputs
- Bitrate (Mbps)20
- Duration (seconds)600
Result
- Approximate file size (GB)1.5
- File size (MB)1,500
Results explained
- Approximate file size (GB)
- Approximate file size (GB) from the formula above. Constant bitrate estimate; include combined audio/video bitrate where relevant. Container overhead excluded.
- File size (MB)
- File size (MB) from the formula above. Constant bitrate estimate; include combined audio/video bitrate where relevant. Container overhead excluded.
Frequently asked questions
decimal GB=bitrate(Mbps)×seconds/8000
Constant bitrate estimate; include combined audio/video bitrate where relevant. Container overhead excluded.
Units appear in input and result labels. Keep lengths, pixel counts, bitrate and time units consistent.
Mathematical results follow the stated model; actual lenses, compression, viewing preferences and device specifications may differ.
No. It calculates from your entered values entirely in the browser.