CPU Millicores Converter

Convert CPU cores and millicores

Kubernetes measures CPU in units of cores, and a common shorthand is the millicore, where 1000m equals one full CPU core. This converter translates between the two: enter a value in cores to get millicores, or a value in millicores to get the equivalent fraction of a core and a percentage. So 500m is half a core, or fifty percent of one CPU. The millicore unit lets you request fine-grained slices of CPU for your containers.

One core corresponds to one virtual CPU on the node, whether that is a physical core, a hyperthread or a cloud vCPU.

Right-sizing CPU requests

Setting CPU requests and limits appropriately is key to efficient scheduling and stable performance. Requests reserve guaranteed CPU for scheduling, while limits cap usage. Because manifests often use millicores, being able to convert to and from whole cores makes it easier to reason about capacity, compare against node sizes, and interpret monitoring dashboards that may report either unit.

Remember that CPU is a compressible resource: exceeding a CPU limit throttles the container rather than killing it, unlike memory. This converter keeps the units clear. All calculation happens locally in your browser.

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