Backup Size Calculator

Backup Storage Estimate

Calculate total backup storage for a retention policy

Total Data Size (GB)

Daily Change Rate (%)

Backup Strategy

Retention Period (days)

Compression

Backup Time Estimate

Estimate how long a backup will take

Data to Backup (GB)

Transfer Speed

Formula

Incremental Storage = (Weeks x Full Size) + (Days x Daily Change) | Backup Time = Data Size / Transfer Speed

Frequently Asked Questions

What is the difference between incremental and differential backups?

Incremental backups store only changes since the last backup (any type), making them small and fast. Differential backups store all changes since the last full backup, growing larger each day but requiring only the last full + last differential to restore. Incremental needs full + all incrementals to restore.

How often should I do full backups?

Weekly full backups with daily incrementals is the most common strategy. For critical databases, consider daily fulls. The decision depends on backup window (how long the full backup takes), storage cost, and restore time requirements (RTO). More frequent full backups = faster restore but more storage.

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