BACKUP CAPACITY CALCULATOR
Build an understandable first estimate of retained backup storage. Nothing entered here leaves your browser.
Planning estimate
Enter your values and run the tool to see results.
Method and limits
The calculator converts protected data to binary GiB, applies growth, divides stored fulls and changed data by the chosen reduction ratio, and adds retained periodic fulls, incrementals and safety headroom. Frequency changes the restore-point count but does not multiply the total unique daily change.
Real consumption depends on workload change patterns, retention chains, metadata, filesystem allocation, backup mode, encryption, compression and deduplication scope. This intentionally does not model a specific vendor.
Planning estimate only. Validate sizing with workload measurements, the selected backup product and a tested capacity model before purchase or production use.