Database Storage Calculator

Estimate table data, index overhead and reserved growth capacity.

About the Database Storage Calculator

This calculator creates a planning estimate from row count and average row width, then adds index and future-growth allowances.

How to use it

  1. Enter the expected number of rows and average bytes per row.
  2. Add estimated index overhead and reserved growth percentages.
  3. Calculate to compare raw data, index size and total capacity.

Estimation formula

Raw bytes = rows × average row size. Index bytes = raw bytes × index percentage. Growth overhead is applied to raw data plus indexes.

Example

One million rows at 500 bytes each produce 500 MB of raw data before index and growth allowances.

Estimate note

This is an estimate. Actual results depend on database engine, configuration, compression, indexes, and workload. Display units use decimal base 1000.