IT operations

Subnet Calculator

Calculate network range, usable hosts, broadcast address, and CIDR details. Use this Networking and IT tool to enter your numbers, review the result, and understand the key assumptions before making the next decision.

What you get
A focused calculator, clear explanation, common questions, and useful next tools.
Quick intro
Calculator
Result
Explanation
Common questions
Related tools

Calculator tool

How this calculator works
The result depends on the numbers you enter and the assumptions shown below.

CIDR prefixes define how many bits belong to the network portion of an IPv4 address. The calculator derives the subnet mask, network address, broadcast address, and usable host count from that prefix.

Review the inputs carefully and treat the output as an estimate. For decisions involving money, taxes, health, law, or security, compare the result with trusted professional guidance when needed.

Frequently asked questions

Does this support IPv6?

This calculator focuses on IPv4 subnet planning.

Can it show binary math?

The calculator focuses on the practical network range, usable hosts, broadcast address, and CIDR details used for planning.