How to Use Free Online IP Calculator
Our free online IP calculator provides instant network information calculation from IP addresses and subnet masks. Supports both CIDR notation and dotted decimal subnet masks. Simply enter your IP and subnet, and get comprehensive network details including network address, broadcast address, usable IP range, and binary representations. No signup required.
Key Features
Calculate network and broadcast addresses instantly. Determine usable IP range with first and last usable IPs. Support for both CIDR notation (/24) and subnet mask (255.255.255.0). Display total and usable host counts. Show IP class and type (Private/Public). Binary representation of all addresses. Wildcard mask calculation. One-click copy for all values. Works offline after loading. Completely secure - all processing happens in your browser.
Comprehensive Network Information
Get complete network information including network address, broadcast address, first and last usable IP addresses, total hosts, and usable hosts. Understand your network's IP class (A, B, C, D, E) and type (Private, Public, Loopback, Link-Local, Multicast). View binary representations for deeper understanding of IP addressing and subnetting.
Why Use This Tool?
Perfect for network administrators, IT professionals, students, and anyone working with IP networks. Plan your network subnetting with accurate calculations. Validate IP configurations before deployment. Learn IP addressing and subnetting concepts with binary representations. Save time with instant calculations and quick copy functionality.
Frequently Asked Questions
Is this tool free to use?
Yes, completely free with no limitations or signup requirements.
What input formats are supported?
Supports both CIDR notation (e.g., /24) and dotted decimal subnet masks (e.g., 255.255.255.0).
What information does it calculate?
Network address, broadcast address, usable IP range, subnet mask, wildcard mask, host counts, IP class, IP type, and binary representations.
Does it work offline?
Yes, once loaded, it works completely offline in your browser.
Is my data secure?
Absolutely. All calculations happen locally in your browser. No data is sent to servers.
Can I copy the results?
Yes, each calculated value has a copy button for quick clipboard access.