Subnet Calculator
CIDR maths for IPv4 and IPv6 networks.
How to use Subnet Calculator
- Enter a network like 192.168.1.0/24
- Read the range
About Subnet Calculator
Subnet Calculator is a free online developer tool that lets you cIDR maths for IPv4 and IPv6 networks. It runs entirely in your web browser, so there is nothing to download or install and you never need to create an account.
Simply open the tool, add your content, and get your result in seconds. A live preview lets you check the result before you download it.
Subnet Calculator is 100% free with no limits, no watermarks and no sign-up. Your input is processed securely in your session and is never stored on our servers. Popular searches for this tool include Subnet Calculator, CIDR Calculator, IP Range Calculator.
Features
- ✓100% free with no usage limits
- ✓Works in any browser — nothing to install
- ✓Instant live preview of your result
- ✓Mobile, tablet and desktop friendly
Benefits
- ★Save time with fast, one-click processing
- ★No software, no registration and no email required
- ★Your data stays private — nothing is stored
- ★Completely free, with no hidden costs or watermarks
- ★Use it anywhere, on any device with a browser
Frequently asked questions
Is Subnet Calculator free to use?
Yes, Subnet Calculator is completely free with no usage limits, no watermarks and no sign-up required.
Do I need to install software or create an account?
No. The tool runs entirely in your web browser — there is nothing to download and no account to create.
Is my data stored or shared?
No. Your input is processed securely in your session and is never stored or shared.
How do I use Subnet Calculator?
It takes just a few steps: enter a network like 192.168.1.0/24; read the range.
Does Subnet Calculator work on mobile and Mac/Windows?
Yes. It works in any modern browser on phones, tablets, Windows, macOS and Linux.