# Subnet Calculator

> Calculate subnet mask, network address, broadcast address, usable host IP range, and total hosts for any IPv4 address and CIDR prefix.

**URL:** https://www.calculatoranswers.com/subnet-calculator
**Category:** Converters

## Quick Answer

Calculate IPv4 subnetting details. Enter an IP address and select a CIDR prefix to find the network, broadcast, wildcard mask, and usable host range.

## Definition

A subnet calculator is a networking utility that divides an IP address space into logical network segments (subnets). By combining an IPv4 address with a Classless Inter-Domain Routing (CIDR) prefix (ranging from /0 to /32), the calculator determines the subnet mask, network ID, broadcast address, wildcard mask, and the range of usable host IP addresses. It also computes the total number of hosts and the number of usable hosts (subtracting the network and broadcast addresses). Network engineers, systems administrators, and IT students use this tool to design subnetting schemes and troubleshoot routing configurations.

## How to Use

1. **Enter IP address** — Type an IPv4 address (e.g., 192.168.1.1).
2. **Select CIDR prefix** — Choose the CIDR subnet mask prefix from /0 to /32 (e.g., /24).
3. **Review subnet details** — Read the resulting subnet mask, network address, broadcast address, wildcard mask, and host IP ranges.

## Disclaimer

This calculator provides estimates for educational and planning purposes. Always consult a qualified professional for specific advice on financial, medical, legal, or other regulated decisions.

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