Developer Experience
PR Size Complexity Estimator
Enter PR size statistics to estimate review complexity, estimated review time, and whether the PR should be split based on standard thresholds.
No data is transmitted — everything runs locallyTool
Example — 180 added · 45 deleted · 12 files · 60 test lines
Total lines changed
225
180 added, 45 deleted
PR size
Medium
≤200 small, ≤500 medium, >500 large
Est. review time
45 min
based on size + 12 files
Test ratio
0.33×
✓ Good coverage
About this tool
PR Size Complexity Estimator
The PR Size Complexity Estimator computes review complexity and estimated review time from lines changed, file count, and test ratio, with split recommendations.
• Estimate review time for a PR before requesting reviewers
• Check whether a PR is above the team's size threshold before submitting
• Calculate test ratio for a PR to identify insufficient test coverage
• Model review time for sprint planning when PRs are queued for review
Affiliate disclosure
Uptime, incident, and on-call management. Better Stack provides status pages, incident management, and on-call scheduling for engineering teams.
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FAQ
What does this tool tell you?
The PR Size Complexity Estimator computes review complexity and estimated review time from lines changed, file count, and test ratio, with split recommendations.
What affects the result most?
PR size thresholds: <250 lines changed = small (reviewable in <30 min), 250-500 = medium, >500 = large. Review time correlation: review time scales super-linearly with PR size — 2× lines ≠ 2× review time. File count impact: 50 changes across 20 files requires more context-switching than 50 changes in 2 files.
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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