API Design
API Pagination Calculator
Enter total record count, page size, and current page to compute offset pagination performance impact and cursor pagination break-even point.
No data is transmitted — everything runs locallyTool
About this tool
API Pagination Calculator
The API Pagination Calculator computes offset pagination performance at depth, cursor pagination break-even, and total page count with performance comparison.
• Determine when to migrate from offset to cursor pagination based on record count
• Calculate the database offset cost at page 500 with a 25-item page size
• Compare cursor vs keyset pagination for a specific ordering and insert rate
• Estimate total page count and last page offset for a given dataset size
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FAQ
What does this tool tell you?
The API Pagination Calculator computes offset pagination performance at depth, cursor pagination break-even, and total page count with performance comparison.
What affects the result most?
Offset pagination: LIMIT N OFFSET M — simple but performance degrades at high offsets (full scan). Cursor pagination: WHERE id > last_cursor LIMIT N — O(1) regardless of depth, no skip counting. Page number: page=3&per_page=25 — user-friendly but offset-based under the hood.
How should I use the result?
The calculation is deterministic — the same inputs always produce the same output — so the most useful workflow is to vary one input at a time and see which factor moves the result most. That tells you where to focus your attention before committing to a decision.
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