IP Calculator

A fully functional IPv4 Calculator. An invaluable tool for support engineers when planning networks, configuring firewall rules or managing IPv4 networks.

Subnet Mask Calculator
TCP/IP Network Address:
Force Class: Default Class A Class B Class C
Number of Subnets:
OR number of IPs per network:

Network Class:
Subnet Mask: or
Number of Subnets:
IPs per network:

Network/Node Calculator
Subnet Mask:
TCP/IP Network Address:

Node/Host Address:
Broadcast Address:

IP Address Converter
Dotted Decimal TCP/IP Address:
OR Decimal TCP/IP Address: