Subnet Calculator
Calculate subnet masks and network ranges.
Calculation results will appear here
Enter an IP and subnet mask above to get started.
About the Subnet Calculator
An easy-to-use tool for network administrators and developers to calculate and understand IP subnets. Enter an IP address and a subnet mask to get a complete breakdown of network details, including network address, broadcast address, usable host range, and more.
Subnetting is a core concept in computer networking, but calculating the details can be complex and error-prone. This calculator automates the process, helping you plan network layouts, troubleshoot connectivity issues, and configure network devices with confidence. It saves time and ensures accuracy, whether you're working on-premise or in the cloud.