Inputs
A pod CIDR, the target CNI (Calico or Cilium), and the desired max pods per node.
AdeOS interactive tools
CNI IP Pool & Block Size Calculator
Work out the right per-node IPAM block size and how many nodes a pod CIDR can support.
CNI IP Pool & Block Size
Calico · CiliumRecommended Block Size
/26
Addresses per Block
64
Max Nodes Supported
1,024
Calico's default IPAM block size is /26; this floor is respected even when a smaller block would fit more pods per block.
Recommend a CNI block size and the resulting maximum node count for a pod CIDR.
Outputs
Recommended block prefix, addresses per block, and maximum supportable node count.
Example
Plan Calico block sizing for a 10.244.0.0/16 pod CIDR with 50 pods per node.
Important note
Results support planning and learning; verify production changes against your platform and change controls.