CIDR/Subnet Calculator - Free, Instant, In Your Browser
Enter a CIDR block like 192.168.1.0/24 to see its full subnet breakdown.
How to use CIDR Calculator
- 1Paste your text or data into the input box above.
- 2CIDR Calculator runs instantly, right in your browser.
- 3Copy the result or use it directly.
Your file is only processed temporarily for the conversion and is automatically deleted within 24 hours.
Frequently Asked Questions
What format is expected?
An IPv4 address followed by a slash and prefix length, e.g. 10.0.0.0/16.
Does this support IPv6?
Not currently - this tool works with IPv4 CIDR blocks only.