Network Mask Calculator

About this tool

Network Mask Calculator is a free online XploreNetHub tool that converts subnet masks between decimal format and CIDR notation. Everything runs directly in your browser, with no software to install.

With Network Mask Calculator you get fast, easy-to-read results that are useful for both professional and everyday use.

How to use

  1. Enter the mask or CIDR prefix in the field provided.
  2. Click the action button to run the Network Mask Calculator.
  3. Review the result shown on screen and copy or share it as needed.

Use cases

  • Quickly convert between decimal mask and CIDR.
  • Find out how many hosts a mask supports.
  • Support network addressing planning.

Frequently asked questions

Is the Network Mask Calculator free?

Yes. The XploreNetHub Network Mask Calculator is 100% free, with no sign-up or installation required.

Do I need to install anything to use the Network Mask Calculator?

No. The tool runs entirely in your browser and works on any device with an internet connection.

How does the Network Mask Calculator work?

Just enter the mask or CIDR prefix and run it; the Network Mask Calculator converts subnet masks between decimal format and CIDR notation and shows the result instantly.

Is my data stored?

We do not store the data you submit. Processing happens only to produce the result of your request.

Can I use the Network Mask Calculator on mobile?

Yes. The interface is responsive and works on phones, tablets and desktops.