Observability & SRE
Log Sampling Rate Calculator
Enter current log volume, cost target, and error log percentage to compute the sampling rate needed to hit your budget while keeping 100% of error logs.
Calculations run locally in your browserTool
About this tool
Log Sampling Rate Calculator
The Log Sampling Rate Calculator computes the optimal sampling rate to hit a cost target, modeling error log preservation and statistical validity at the sampled volume.
• Calculate the INFO log sampling rate needed to reduce logging costs by 60%
• Model the cost savings from sampling DEBUG logs at 1% vs 10%
• Design a tiered sampling strategy with different rates per log level
• Validate that a target sampling rate preserves enough volume for statistical significance
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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 Log Sampling Rate Calculator computes the optimal sampling rate to hit a cost target, modeling error log preservation and statistical validity at the sampled volume.
What affects the result most?
Optimal sampling rate: target_cost / current_cost × 100 — what rate hits your budget?. Error log preservation: sample 100% of ERROR/FATAL, reduce INFO/DEBUG to hit cost target. Statistical validity: at X% sampling, minimum sample size for 95% confidence in a rare event.
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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