Database Size Estimator
Estimate database storage from rows.
Keep or share the finished result
Copy or share after running the tool. Saved tools and settings stay in this browser.
What would you like to do next?
Estimate database size
Database storage planning starts with row count, average row size, indexes and replicas. Enter rough values to estimate base data, indexed size and copied storage. It is useful for product planning, migrations, analytics tables, SaaS dashboards and content databases.
Early database sizing
Use measured samples when possible, then add room for engine overhead and future growth.
Frequently asked questions
How do I find average row bytes?
Use database statistics or sample table sizes divided by row count.
Why add index overhead?
Indexes speed queries but often add significant storage.
Is this exact?
No. Storage engines, data types and compression can change real size.