Kubernetes Cost Calculator Template (Free Excel & Sheets)

Every FinOps journey starts with a spreadsheet.

You open Excel or Google Sheets, you paste in the AWS Price List for m5.xlarge, you count your nodes, and you multiply.

But Kubernetes is dynamic. Nodes scale up and down. Spot prices change. Pods move between zones. A static spreadsheet is often obsolete the moment you save it.

In this guide, we’ll look at the Manual Way (Spreadsheet) vs. the Automated Way (Interactive Tool) to help you decide which is right for your stage.

[!TIP] Skip the Spreadsheet We have already built the logic for you. Use our free Interactive Kubernetes Cost Estimator to model your cluster in seconds.

Option 1: The Spreadsheet (The Manual Way)

This is great for forecasting new clusters before you build them.

The Formula

To build your own calculator, you need to sum these four components:

Total Cost = Control Plane + Compute + Storage + Network

1. Control Plane

• EKS: $73/month (fixed).
• Self-Managed: Cost of 3x master nodes + etcd storage.

2. Compute (The Hard Part)

You need to account for:

• Instance Count: How many nodes?
• Utilization: Are they 100% full? (Hint: No. Use a 1.2x buffer).
• Purchase Option: On-Demand vs. Spot vs. Savings Plan.

3. Storage

• EBS: Sum of all PVC sizes * $0.08/GB (GP3).
• Snapshots: Estimate 10-20% of storage cost.

4. Network (The “Missing” Line Item)

Most templates forget this.

• NAT Gateways: $0.045/GB.
• Cross-AZ: $0.01/GB.
• Load Balancers: $16/mo + LCU fees.

Download Our Template

If you want to do this manually, we have created a Google Sheet Template (Link to template) that includes these formulas.

Option 2: The Interactive Tool (The Automated Way)

Spreadsheets break when:

• You use Mixed Instance Policies (Spot + On-Demand).
• You have Auto-Scaling Groups (ASG) that scale from 10 to 100 nodes daily.
• You use Fargate.

Why use a Tool?

1. Dynamic Modeling: Change “Spot %” from 0% to 50% and see the savings instantly.
2. Visual Breakdown: See a pie chart of Compute vs. Network.
3. Hidden Costs: Tools like ours automatically calculate the “EKS Tax” (Control Plane + DaemonSets).

Try It Now

We built the ClusterCost Estimator to replace your spreadsheet.

• Input: Node count, Instance Type, Storage GB.
• Output: Total Monthly Bill + Per-Category Breakdown.

Launch Calculator →

Summary: Build vs. Buy

Recommendation:

• Planning Phase: Use our Interactive Estimator.
• Running Phase: Use a real-time agent (like ClusterCost CLI).
• Reporting Phase: Use a SaaS platform.