Database Storage Growth Cost Calculator
If your database grows steadily, average GB over a month is often a better cost estimate than the end-of-month number. This tool estimates growth and the implied average monthly storage cost.
Inputs
Starting size (GB)
Growth (GB / day)
Horizon (months)
Storage price ($ / GB-month)
Results
Ending size (est.)
1,412 GB
Average size (est.)
956 GB
Estimated monthly cost (average)
$114.72
Example scenario
- Starting 500 GB and growing 5 GB/day over 6 months → estimate ending size and average monthly cost.
Included
- Ending size estimate using a linear growth assumption.
- Average size estimate and implied average monthly storage cost.
Not included
- Non-linear growth, compaction, and retention policies that change growth rate.
- Replica/index/storage-class multipliers unless you model them in effective GB.
How we calculate
- Ending GB ≈ starting GB + (growth GB/day × days).
- Average GB ≈ (starting + ending) ÷ 2 (linear growth assumption).
- Estimated monthly cost ≈ average GB × storage price per GB-month.
FAQ
Is growth really linear?
Not always. Use this as a planning approximation, and update with real metrics over time.
Should I include indexes and replicas?
Yes, if your provider bills them separately. You can increase the effective storage GB or model components separately.
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Disclaimer
Educational use only. Not legal, financial, or professional advice. Results are estimates based on the inputs and assumptions shown on this page. Verify pricing and limits with your providers and documentation.
Last updated: 2026-01-06