Containers & Docker
Build Cache Sizing Calculator
A build cache that is sized below its working set delivers the same wall-clock build time as no cache at all. The builder rebuilds every layer on each run, and the measured hit rate drops to near zero. The four inputs above estimate the storage footprint a working cache actually needs, given the team's current build volume and retention window.
No data is transmitted — everything runs locallyTool
About this tool
Build Cache Sizing Calculator
Size a CI build cache from daily builds, unique layers per build, average layer size, and retention window. Browser-only — no data sent.
• Evaluate current state against industry benchmarks
• Identify optimization opportunities
• Support capacity planning and cost decisions
Affiliate disclosure
Sponsored tool. This tool is brought to you by our partners. No data is collected or transmitted.
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FAQ
What does this tool tell you?
Size a CI build cache from daily builds, unique layers per build, average layer size, and retention window. Browser-only — no data sent.
What affects the result most?
Size a CI build cache from daily builds, unique layers per build, average layer size, and retention window. Browser-only — no data sent.
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.