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Subnet Mask Converter

Convert from normal dotted decimal Subnet Mask
Enter the dotted decimal Subnet Mask:	...

Convert from number of bits in the subnetmask
Enter the number of bits in the subnetmask:	/

Converting Subnet Mask Tutorial

This tool will convert dotted decimal subnet mask to number of bits in the subnet mask and vice versa.

For example we want to convert from dotted decimal subnet mask: 255.255.255.0
This subnet mask we can write in binary:

    255.255.255.0  = 11111111.1111111.11111111.00000000

From above binary, we can count number of 1 is 20. So the number of bits in subnetwork is 20.