Subnet Calculator
To calculate a subnet, enter an address with a CIDR prefix or mask (192.168.1.0/24): ClickZM returns the network and broadcast addresses, subnet and wildcard masks, usable host range and count (254 for a /24), and can split the network into smaller subnets or find the prefix for a host count.
- Free
- No signup
- Runs in your browser
How to use Subnet Calculator
- 1Enter your values in the fields; defaults show a worked example.
- 2Pick the units or options that apply to you.
- 3Read the result, which updates instantly as you type.
- 4Check the formula note under the result to see exactly how it was worked out.
Subnet Calculator: questions people ask
How many hosts are in a /26?
64 addresses, 62 usable.
What is a wildcard mask?
The inverse of the subnet mask (0.0.0.255 for /24), used in Cisco ACLs and OSPF.
Is my data uploaded when I use the Subnet Calculator?
No. The Subnet Calculator runs entirely in your web browser, so your text and numbers stay on your device and work even on a slow connection.
Does the Subnet Calculator work on iPhone, Android and Mac?
Yes. The Subnet Calculator runs in any modern browser (Safari, Chrome, Edge or Firefox) on iPhone, iPad, Android phones, Mac, Windows and Chromebook. There is no app to install.
Is the Subnet Calculator free?
Yes. The Subnet Calculator is free with no signup, no watermark and no daily limit.