CIDR Calculator
CIDR calculator for blocks like 192.168.0.0/24: get the network address, IP range, usable host count, broadcast address and subnet mask. Free and instant in your browser for fast subnet planning.
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Last updated: 2026 · Free online tool
What is CIDR Calculator?
CIDR calculator for blocks like 192.168.0.0/24: get the network address, IP range, usable host count, broadcast address and subnet mask. Free and instant in your browser for fast subnet planning.
How to Use
- 1Input— Enter the required data.
- 2Results— Review the calculated results.
- 3Copy— Copy the results to use.
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Frequently Asked Questions
A free online tool that calculates IP ranges and subnets using CIDR notation.
Yes, it is completely free.
No. All processing happens in your browser.
Yes, the responsive design works on mobile devices.
Yes, it works offline as it uses static data.