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IP Subnet Calculator
Calculate IP subnets, subnet masks, and CIDR notation. Find network address, broadcast address, host range, and number of hosts.
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Coming in the next update
This calculator is being added shortly. All formula logic is already implemented in the controller layer.
How to Use the IP Subnet Calculator
Enter your values above for an instant result. This tool uses verified formulas and is optimised for users in USA, Canada, UK, Australia. All calculations happen in your browser — your data is never sent to our servers.
Frequently Asked Questions
What is a /24 subnet?
A /24 subnet (255.255.255.0 mask) provides 256 addresses (254 usable hosts), one network address, and one broadcast address.