Free tool
NetworkingIP Address Converter
Convert any IPv4 address between decimal, binary, and hexadecimal instantly. Free browser-based tool for subnetting practice and networking students.
Runs in your browser — your data stays on your device
Free toolEvery IP address you type into a router or subnet calculator is really just a human-friendly way of writing four binary octets. Understanding that binary underneath the decimal is what makes subnetting click. This converter takes an address in decimal, binary, or hex and instantly shows you the other two formats side by side.
How to use the IP address converter
- 1
Enter an IPv4 address in decimal format, for example 192.168.1.1.
- 2
The tool converts each octet to 8-bit binary and to hexadecimal automatically.
- 3
You can also paste in a binary or hex address to convert back to standard dotted-decimal notation.
Why binary conversion matters for subnetting
Subnet masks, wildcard masks, and CIDR boundaries all operate on binary bits, not decimal numbers. When you understand that 255 in an octet is 11111111 in binary, subnet boundaries stop being arbitrary and start being visible. This is one of the fastest ways to build real subnetting intuition.
Worked example
Converting 10.0.0.1 to binary gives you 00001010.00000000.00000000.00000001. Converting 255.255.255.0 gives you 11111111.11111111.11111111.00000000. Lay the two side by side and it's immediately obvious: the first 24 bits define the network, and the rest is host space.
Guides and next steps
Privacy note
Address conversions are performed locally. Nothing is uploaded or logged.
Frequently asked questions
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