IP Calculator
Fast, accurate and free online ip calculator tool running directly in your browser.
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1Enter data
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2Click the button
The tool will immediately process your data in the browser. -
3Get the result
Copy the finished text or save the file to your device.
return "Result ready in 0.1s";
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11000000 10101000 00000001 0000101011111111 11111111 11111111 0000000011111111 11111111 11111111 11111111 00000000 00000000 00000000 11111111Rate this tool:
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Other tools you may find usefulIP Calculator - calculate subnet mask, address range and number of hosts
IP Calculator is a practical online tool created for network administrators, IT students and technology enthusiasts. It allows you to instantly calculate IPv4 addressing parameters - including subnet mask, network address, broadcast, first and last host addresses and the number of available hosts. Just enter the IP address and mask or CIDR notation to get the full report.
How does the IP calculator work?
The IP Calculator uses the principles of binary network mathematics. Each IP address consists of four octets (e.g. 192.168.1.10), and the subnet mask (e.g. 255.255.255.0 or /24) determines which bits correspond to the network ID and which bits correspond to the host address. Our calculator automatically separates these parts and calculates all the information you need in a fraction of a second.
For the address
192.168.0.1/24the tool will calculate:- Network address:
192.168.0.0 - Broadcast:
192.168.0.255 - Number of hosts:
254 - Host range:
192.168.0.1 – 192.168.0.254
Why use the IP calculator?
- Precise results:instantaneous calculation of mask, ranges and number of hosts.
- CIDR support:enter e.g.
/26and the calculator will calculate the mask 255.255.255.192. - Subnetting:discover all networks resulting from the division of a larger address block.
- Education:the perfect tool for learning how IP and bit masking work.
- Universal:works in any browser, without installation and login.
IPv4 Addressing Basics
An IPv4 address is a 32-bit binary number written in dotted decimal format. It is divided into network and host parts. The subnet mask determines how many bits the network part occupies. This makes it possible to logically divide the network into smaller segments - the so-called subnets.
In practice, we often use the shorthand notation CIDR (Classless Inter-Domain Routing). Instead of the mask255.255.255.0just enter/24, which means that the 24 bits specify the network part.
Common subnet masks
| Mask | CIDR notation | Number of hosts |
|---|---|---|
| 255.255.255.0 | /24 | 254 |
| 255.255.255.128 | /25 | 126 |
| 255.255.255.192 | /26 | 62 |
| 255.255.255.224 | /27 | 30 |
| 255.255.255.240 | /28 | 14 |
| 255.255.255.248 | /29 | 6 |
How to use the calculator?
- Enter the IP address (e.g.
10.0.0.15). - Enter a mask (e.g.
/16or255.255.0.0). - ClickCalculate.
- Read the result – network address, broadcast and number of hosts.
Professional uses of the IP calculator
In IT environments, the IP calculator is an essential tool. Administrators use it to plan LAN and WAN networks, configure routers, establish DHCP scopes, and diagnose address conflicts. In education, it allows you to understand the mechanisms of operation of the TCP/IP protocol.
In the telecommunications and data center industries, the IP calculator facilitates address space planning, prevents duplication and supports network security.
IPv6 - the future of addressing
Although the calculator focuses on IPv4, many of the principles remain consistent with IPv6 - a new standard that uses 128-bit addresses. An extended version of the IP calculator that also supports IPv6 is planned soon.
Frequently asked questions (FAQ)
What is a subnet mask?
This is a number that indicates which bits of the IP address belong to the network and which bits belong to the host. For example, 255.255.255.0 is 24 network bits and 8 host bits.
What is the difference between /24 and /30?
/24 allows for 254 hosts, /30 only allows for 2 - ideal for point-to-point links between routers.
Why is 127.0.0.1 localhost?
This is a loopback address used to test local connections without using the network.
Summary
IP calculator available atWebP.plis a free, simple and precise tool for managing network addresses. With its help, every IP configuration will become faster, more logical and error-free.
Launch the IP Calculator