Kubernetes Cluster Cost Calculator

About the Kubernetes Cluster Cost Calculator

Kubernetes has become the standard for container orchestration, but the cost of running a production cluster goes well beyond just worker node compute. Managed Kubernetes services like AWS EKS, Google GKE, and Azure AKS charge for the control plane, while worker nodes, load balancers, persistent volumes, and data transfer add substantially to the total.

EKS charges $0.10/hour ($73/month) per cluster for the control plane alone. Worker nodes are billed as standard compute instances. Add-ons like ALB Ingress Controllers, EBS/EFS storage, and NAT Gateways can double the base compute cost if not planned for carefully.

This calculator helps you model the total cost of ownership for a Kubernetes cluster by summing control plane fees, worker node compute, load balancer costs, and persistent storage. Use it to compare managed versus self-hosted Kubernetes and to right-size your cluster for expected workloads.

When This Page Helps

Kubernetes costs are notoriously difficult to predict because they span multiple cloud services. Teams frequently underestimate total cluster cost by 40–60% by accounting only for worker nodes. This calculator captures all the major cost components, giving you a realistic budget for cluster operations.

How to Use the Inputs

1. Enter the control plane cost per month (e.g., $73 for EKS, $0 for GKE Standard).
2. Set the number of worker nodes and their hourly rate.
3. Enter the number of load balancers and their monthly cost.
4. Set the persistent storage volume in GB and per-GB rate.
5. Add any additional monthly costs (NAT Gateway, monitoring, etc.).
6. Review the total cluster cost breakdown.

Example Calculation

Tips & Best Practices

• GKE Standard mode has a free control plane; Autopilot charges per pod resources consumed.
• Use Karpenter (EKS) or Cluster Autoscaler to scale nodes dynamically and reduce idle capacity.
• Mix spot/preemptible nodes for non-critical workloads to save 60–90% on worker nodes.
• Use a single ALB with path-based routing instead of one ALB per service.
• Right-size pods with Vertical Pod Autoscaler to improve bin-packing efficiency.
• Consider Fargate (EKS) for sporadic workloads to avoid maintaining a node pool.

Kubernetes Cost Components Deep Dive

A production Kubernetes cluster on AWS typically includes: EKS control plane ($73/mo), 3–10 worker nodes ($100–$500/mo each), 1–3 load balancers ($20–$50/mo each), persistent volumes ($0.10/GB/mo for gp3), NAT Gateways ($32.85/mo per AZ), and CloudWatch logging ($0.50/GB). The total easily reaches $500–$5,000/month for a modest production cluster.

EKS vs GKE vs AKS Cost Comparison

EKS has a $73/mo control plane fee; GKE Standard is free. GKE Autopilot charges for pod resources only, which can be cheaper for small workloads. AKS has a free control plane with an optional paid uptime SLA. Worker node costs depend on the underlying compute pricing, where GCP often has a small edge due to sustained-use discounts.

Optimizing Kubernetes Spend

The biggest savings come from pod right-sizing (use VPA recommendations), cluster autoscaling (scale to zero for dev/staging), spot instances for worker nodes (use multiple instance types for availability), and efficient bin-packing (request-based scheduling with proper resource requests and limits).

Frequently Asked Questions

• How much does the Kubernetes control plane cost?

  AWS EKS charges $0.10/hr ($73/month). GKE Standard is free; GKE Autopilot charges per pod. Azure AKS is free for the control plane. Self-managed Kubernetes requires you to run your own control plane instances.

• What worker node instance type should I use?

  For general workloads, m5.large (2 vCPU, 8 GB) or m5.xlarge (4 vCPU, 16 GB) are common starting points. Size based on your pod resource requests and leave 15–20% headroom for system pods and scheduling overhead.

• Should I use Fargate or managed node groups?

  Fargate eliminates node management and is ideal for sporadic workloads, but costs 20–40% more per vCPU-hour than EC2. Managed node groups are cheaper at scale and offer more control. Many clusters use both for different workloads.

• How do I reduce Kubernetes costs?

  Key strategies: use cluster autoscaler to scale down during low traffic, run spot instances for fault-tolerant workloads, right-size pod requests, consolidate small clusters, use namespace resource quotas, and implement pod disruption budgets for efficient scheduling. Consulting relevant industry guidelines or professional resources can provide additional context tailored to your specific circumstances and constraints.

• What are the hidden costs of Kubernetes?

  Commonly overlooked: NAT Gateway ($32.85/mo + $0.045/GB), CloudWatch logging ($0.50/GB), EBS volumes for PVCs, cross-AZ data transfer for pod-to-pod communication, and ALB/NLB charges for each exposed service.

• Is self-managed cheaper than EKS/GKE?

  Self-managed Kubernetes eliminates the control plane fee ($73/mo for EKS) but adds significant operational overhead: patching, upgrades, etcd management, and monitoring. For most teams, the managed service fee is a bargain compared to engineering time.