Cloud Log Volume Estimator
Estimate log storage before selecting a retention policy. Use a representative event rate and average size from measured traffic rather than assuming all logs are the same size.
How to use this calculator
- Enter the log events per second using the units shown beside the field.
- Enter the average bytes per event using the units shown beside the field.
- Enter the logging hours per day using the units shown beside the field.
- Review the calculated values and check that the assumptions match your scenario.
- Change one input at a time when comparing scenarios so you can see which assumption drives the result.
Formula and assumptions
Raw retained bytes = events/second × bytes/event × 3,600 × hours/day × retention days; compressed volume applies the entered reduction percentage.
- Actual storage also includes indexes, replicas, metadata and burst traffic. Compression rates depend on the log format and should be measured.
- The result is computed from the values you provide; it does not fetch external rates, live account data or local rules.
Worked examples
Worked example
At 350 events/s, 850 bytes/event, 24 hours/day and 30 days, raw retained data is about 718 GiB (roughly 0.70 TiB) before any assumed compression.
Example inputs: Log events per second = 350, Average bytes per event = 850, Logging hours per day = 24, Retention days = 30.
Compare the displayed output with your own measurements before using it in a decision.
Understanding the result
Actual storage also includes indexes, replicas, metadata and burst traffic. Compression rates depend on the log format and should be measured.
Results are estimates based on the stated model. If the situation depends on measured conditions or contractual specifications, use those source values rather than typical assumptions.
Important notes
Actual storage also includes indexes, replicas, metadata and burst traffic. Compression rates depend on the log format and should be measured.
Frequently asked questions
What formula does this calculator use?
It uses the method described above: Raw retained bytes = events/second × bytes/event × 3,600 × hours/day × retention days; compressed volume applies the entered reduction percentage.
What should I verify before relying on the result?
Actual storage also includes indexes, replicas, metadata and burst traffic. Compression rates depend on the log format and should be measured.
Can I compare different scenarios?
Yes. Change the inputs while keeping units and definitions consistent, and record the assumptions used for each scenario.
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This page provides a calculation tool plus explanatory information so you can understand what the result means and when the underlying method may not fit your situation.