Kubernetes Resource Calculator
Multiply a pod’s CPU/memory requests and limits by its replica count, runs entirely in your browser.
About this tool
Enter a single pod’s CPU and memory requests and limits (in the exact quantity syntax Kubernetes manifests use, e.g. "250m" or "1" for CPU, "256Mi" or "1Gi" for memory) plus a replica count, and get the total resource footprint the whole Deployment actually asks the cluster for. A request/limit pair on one pod spec doesn’t answer "how much capacity do I need to reserve"; multiplying by replicas does.
Understands both Kubernetes quantity notations: CPU as millicores ("250m") or whole cores ("1", "1.5"), and memory in both binary (Ki/Mi/Gi/Ti, powers of 1024, what Kubernetes itself uses) and decimal (K/M/G/T, powers of 1000) suffixes, formatting the totals back into the same style so the result reads like a real manifest value.
Frequently asked questions
- What is the difference between a request and a limit?
- A request is what the scheduler reserves for a pod when deciding which node to place it on; a limit is the hard ceiling the pod is not allowed to exceed. Sizing cluster capacity against total requests (not limits) is the usual planning approach, since limits can be set higher than requests for burstable workloads.
- Why does "512" sometimes mean bytes and "512Mi" mean something else entirely?
- A bare number with no suffix is treated as bytes for memory, while "Mi" (mebibytes, 1024²) and "Gi" (gibibytes, 1024³) are the binary units Kubernetes manifests almost always use. Mixing up "Mi" (1,048,576 bytes) with "M" (1,000,000 bytes, the decimal SI unit) is a common source of sizing being slightly off.
- Does this account for system-reserved or kube-reserved capacity on nodes?
- No, this only multiplies the pod-level numbers you enter by replica count. Real node capacity planning also needs to subtract what the node OS, kubelet, and kube-proxy themselves reserve, which varies by cluster and is out of scope for this calculation.
- Is my input sent anywhere?
- No. The calculation runs entirely in your browser, no network request is made.
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