Subnet Planning for Kubernetes: Why Most Calculators Are Wrong

📰 Dev.to · Kristoffer Hatland

Learn why common subnet calculators are incorrect for Kubernetes and how to properly plan your network

intermediate Published 9 Mar 2026
Action Steps
  1. Identify the requirements of your Kubernetes cluster
  2. Calculate the number of pods and services needed
  3. Determine the subnet size based on the number of pods and services
  4. Use a subnet calculator that takes into account Kubernetes-specific requirements
  5. Configure your network settings accordingly
Who Needs to Know This

DevOps engineers and network administrators responsible for setting up Kubernetes clusters will benefit from understanding the limitations of common subnet calculators and how to properly plan their network

Key Insight

💡 Common subnet calculators often don't account for Kubernetes-specific requirements, leading to incorrect subnet planning

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🚨 Most subnet calculators are wrong for Kubernetes! 🚨 Learn why and how to properly plan your network

Key Takeaways

Learn why common subnet calculators are incorrect for Kubernetes and how to properly plan your network

Full Article

When planning networks for Kubernetes clusters, many engineers reach for a simple subnet...
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