Subnet Calculator
This subnet calculator computes the network, broadcast, mask and usable host range for an IPv4 subnet. It runs entirely in your browser, so results are instant and nothing you enter is uploaded.
Your input is processed locally in your browser and is not uploaded or stored.
What this tool does
Deriving network, broadcast and host ranges from an address and mask. This subnet calculator is free, works on desktop and mobile, and requires no sign-up.
Also useful for: ip subnet calculator for ipv4 and ipv6, ip subnet calculator ipv6, subnet calculator for ipv6, subnet id calculator ipv6, subnet mask calculator for ipv6.
Features
- Handles subnet calculator with instant, in-browser results
- No account, no upload and no usage limits
- Copy or download results in one click
How to use it
- Enter your input for the subnet calculator
- Read the result as it updates
- Copy or download what you need
Common uses
- Everyday subnet calculator work
- Quick checks while coding or writing
- Learning how the format behaves
Good to know
- For very large inputs, processing speed depends on your device
Frequently asked questions
Is the subnet calculator free to use?
Yes. Every tool on the site is free, needs no account and has no usage limits.
Does it work offline?
Once the page has loaded it runs locally in your browser without further network calls.