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TechnologyGenerated accuracy model review: 2026-05-06

Kubernetes Pod Resource Calculator accuracy and testing

This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.

Formula source

  • Requested CPU cores = pods * CPU request millicores / 1000. Requested memory GB = pods * memory request MiB / 1024. Nodes = ceil(max(requested CPU / usable node CPU, requested memory / usable node memory)).

Test cases

Default input regression check

Generated from the checked-in default inputs and calculate function.

Inputs

  • Pods / Replicas: 120
  • CPU Request: 250 mCPU/pod
  • Memory Request: 512 MiB/pod
  • CPU Limit: 500 mCPU/pod
  • Memory Limit: 1,024 MiB/pod
  • Node CPU Capacity: 8 cores
  • Node Memory Capacity: 32 GB
  • Target Utilization: 75%

Expected outputs

  • Nodes Needed: 5
  • Requested CPU: 30 cores
  • Requested Memory: 60 GB
  • CPU Limit Total: 60 cores

Known limitations

  • This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
  • Use the result as a planning estimate unless the calculator page states a stricter purpose.

Assumptions

  • Scheduler constraints, daemonsets, taints, affinity, and pod disruption budgets are not modeled.
  • Target utilization accounts for system and operational headroom.
  • Inputs are local only.

Unit handling

  • Pods / Replicas accepts numeric values.
  • CPU Request accepts values in mCPU/pod.
  • Memory Request accepts values in MiB/pod.
  • CPU Limit accepts values in mCPU/pod.
  • Memory Limit accepts values in MiB/pod.
  • Node CPU Capacity accepts values in cores.
  • Node Memory Capacity accepts values in GB.
  • Target Utilization accepts values in %.
  • Requested CPU is displayed in cores.
  • Requested Memory is displayed in GB.
  • CPU Limit Total is displayed in cores.

Rounding rules

  • Number displays use up to 2 decimal places in the calculator UI.
  • Input precision follows configured step values where provided.

Version history

1.0.0 - 2026-05-06

Generated accuracy and testing page from the current kubernetes-pod-resource-calculator calculator definition.

Change log

2026-05-06

Published default regression test documentation and metadata fallbacks for Kubernetes Pod Resource Calculator.

Calculator transparency

Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.

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