Size total database storage from tables, indexes, growth and overhead.
Indexes frequently rival the table itself in size, so index count belongs in any storage estimate. Compounding growth over the horizon is what determines the provisioning decision. Databases degrade badly when storage fills, so provisioning with 40 per cent headroom is standard rather than cautious.
Database Storage
Storage = (table + indexes) compounded by growth, with headroom added
Storage = (table + indexes) compounded by growth, with headroom added Indexes frequently rival the table itself in size, so index count belongs in any storage estimate. Compounding growth over the horizon is what determines the provisioning decision.
Databases degrade badly when storage fills, so provisioning with 40 per cent headroom is standard rather than cautious.
This calculator takes 6 inputs: Rows in the main table, Average row size, Number of indexes, Index size as a share of table size, Annual growth, Planning horizon. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.