Kubernetes Subnet Calculator

Calculate single-family IPv4 or IPv6 ranges for Kubernetes node subnets, per-node Pod CIDR blocks, and Service ClusterIP capacity. Compare the entered CIDR with node, Pod, or Service demand, and repeat the calculation for the other family in a dual-stack cluster. Everything is calculated in your browser.

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Kubernetes settings

Choose the sizing preset that matches the CIDR you are planning. Rules are advisory; follow the linked documentation when provisioning.

Accepted input formats

CIDR and addresses



Masks and host counts



Ranges and subdivisions