Subnet Calculator

This page provides some IP subnetting Tools. A subnet calculator, An IP address range calculator and a subnet mask calculator.

Subnet Calculator
IP/Netmask:

(input format: 172.16.32.0/24 or 172.16.32.0 255.255.255.0)


Subnet Calculations:

Usable Addresses:
Mask: =
Mask in HEX:
Network Address:
First Usable:
Last Usable:
Broadcast Address:
Check our subnet cheat sheet for more subnetting practice
Number of Addresses to Subnet Mask
Enter Number of Addresses Needed:


Subnet Mask Calculations:


Mask:/
Dotted DEC Mask:
Usable Amount of Addresses:
Subnet Mask to Number of Usable Addresses
Enter Mask: /

Address Calculations:


Usable Amount of Addresses:
Total Number of Addresses:
Netmaks in Dotted Decimal Format: