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Screen Recording File Size Calculator
Estimate recording storage from a measured MB per minute, duration and a free-space allowance.
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Use A Representative Sample
- Record a short MP4 with the same area, movement, frame rate and audio settings as your planned session.
- Divide its size in MB by its duration in minutes. Enter the result as MB per minute.
- Enter the planned duration and an extra free-space allowance. Keep more space available for unusually busy scenes and other files.
What The Estimate Means
File size ≈ MB per minute × minutes. At 20 MB/min for 30 minutes, the estimate is 600 MB; with 25% additional space, allow 750 MB. This calculator uses decimal MB and GB (1 GB = 1,000 MB).
The result is a planning estimate, not a guaranteed size or a promise that a recording will complete. Content, resolution, encoding and audio affect the result. GIF size can vary substantially. Check the saved sample and your real free disk space.