Backup capacity planner
Plan storage for complete backup chains rather than counting only the newest full copy. Keep enough space for the increments needed to restore older days.
Your inputs
Start with the example values, then replace them with your own. For tables, keep the vertical bar separators and use a dot for decimals.
This is an estimate from your inputs, not a guarantee. Check actual capacity, conditions and measurements before making a decision.
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Result and workspace
Use the start button to open your result or activity.
How it works
Retain complete backup chains: chains = ceil(retention / interval); capacity = chains × [full + (interval − 1) × daily increment].
Worked example
These sample results use the original example inputs in the form. They do not change when you edit your inputs; your own result appears in the workspace.
- Retained chains: 5
- Required capacity: 560 GB
Read the result carefully
Results depend on the values and assumptions shown above. Change one input at a time to see its effect. A blank or unavailable result means the data does not support a calculation; it is not zero.