🔢  Cloud & DevOps

IPv4 Subnet Calculator

Split an IPv4 network into a chosen prefix and calculate addresses and usable hosts per subnet.

Free toolClient-sideNo account required

Result

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All processing is performed locally in your browser. Results are estimates and should be checked against your provider, infrastructure configuration and actual usage before making production or financial decisions.

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How to use this calculator

What to enter

Enter or select the following as requested: Original prefix; New subnet prefix. Follow the units, valid ranges, examples, and options displayed beside each field.

What the result means

The output is the transformed value, generated snippet, lookup result, or technical measurement produced from the supplied input and selected options. Review the output before using it, and verify compatibility with the target system or format.

When to use it

Use this as a developer or technical utility for encoding, conversion, validation, calculation, or reference. Do not treat a successful transformation as proof that a system is secure or that generated code is production-ready.