SIMPLE SYSTEMS / ADMIN TOOLS
Backup retention calculator
Estimate storage for full and incremental backup chains, archives and additional copies.
Conservative steady-size estimate. Keeps the base full and dependent incrementals for the worst alignment of the daily retention window. Weekly and monthly archives are additional independent full copies; no overlap or block-sharing discounts are assumed. Daily change is a percentage of the original data set. Reduction is applied equally to full and incremental data. Actual product retention, synthetic fulls, metadata and changing data sizes can differ. All calculations stay in your browser.