How to use CIDR in a few steps
CIDR Calculator is designed so the typical job takes under a minute. Follow these steps:
Step 1: Range expansion
Use the range expansion option to control your result. The interface guides you through it in one click.
Step 2: Host counts
Use the host counts option to control your result. The interface guides you through it in one click.
Step 3: Usable range
Use the usable range option to control your result. The interface guides you through it in one click.
After processing
- Preview your result before downloading so you can redo it if needed
- Download the output directly from your browser
- Repeat as many times as you like — there are no usage limits
What you need to get started
Only a modern browser (Chrome, Firefox, Safari, Edge). The tool accepts text and data inputs as needed, supports large files, and handles everything on your device.
Verdict
With CIDR Calculator you can skip installs, accounts, and uploads. Open CIDR Calculator and finish the job in seconds.