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Estimate index footprint using row count, key width, fill factor, and index type assumptions. Plan storage and tune schema choices with our programming calculator suite.
Last updated: April 14, 2026
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Total Size
216.16 MB
Total Pages
27,669
Leaf Pages
27,558
B-Tree Levels
3
Converts pages to practical disk sizing estimates for capacity planning.
Helps you understand potential lookup traversal depth as data grows.
Uses multipliers to approximate structural differences between index families.
5,000,000 rows with a 24-byte key and 90% fill factor:
Estimated Size
~212 MB
Estimated Levels
~3
The estimator models entry width, page utilization, fanout, and index-type overhead to forecast how many pages your index may require and how large it becomes on disk.
entry-size = key-bytes + pointer-bytes + overheadleaf-pages = (rows × entry-size) / (usable-page × fill-factor)total-pages = leaf + internal-pages × index-type-multiplierShare it with your data and platform engineering team
Suggested hashtags: #Database #Indexing #Postgres #MySQL #CapacityPlanning #Calculator