IP Calculator
What is IP Calculator? (Quick Answer)
IP address calculation tool Free online tool, no registration required, 100% client-side processing.
IP address calculation tool
By Craftisle Team
About IP Calculator — Free Online Tool
How to Use IP Calculator — Step by Step
- Enter IP and subnet
Type an IPv4 or IPv6 address with CIDR suffix (e.g., 192.168.1.0/24).
- View results
Network address, broadcast address, usable host range, total hosts, and subnet mask are displayed.
- Copy results
Copy individual values or the full subnet report.
Use Cases for IP Calculator
Cloud VPC planning
Calculate subnet sizes for AWS VPC, Azure VNet, or GCP VPC subnets.
firewall rule configuration
Determine the correct CIDR block for firewall allow/deny rules.
Network documentation
Generate subnet calculation reports for network architecture diagrams.
FAQ — IP Calculator Free Online Tool
What is CIDR?
Classless Inter-Domain Routing. /24 means the first 24 bits are the network portion. /32 is a single host. Smaller number = larger subnet.
Why can't I use the network address or broadcast address?
Network address (all host bits 0) identifies the subnet. Broadcast address (all host bits 1) is for broadcast traffic. Neither can be assigned to a host.
Does this support IPv6?
Yes. Enter an IPv6 address with CIDR suffix (e.g., 2001:db8::/32). IPv6 subnetting works differently from IPv4 — typically /64 for LAN segments.