Calculator Form
Example Data Table
| Input | Format | Dotted Decimal | Notes |
|---|---|---|---|
| 3232235777 | Unsigned integer | 192.168.1.1 | Private Class C style address |
| 0xC0A80101 | Hexadecimal | 192.168.1.1 | Each two hex digits form one octet |
| 11000000101010000000000100000001 | Binary | 192.168.1.1 | Thirty two bits split into four bytes |
| 10.0.0.15/24 | CIDR | 10.0.0.15 | Shows mask, network, and broadcast |
Formula Used
Integer to dotted decimal: split the 32 bit value into four 8 bit octets.
Octet 1 = (N >> 24) & 255
Octet 2 = (N >> 16) & 255
Octet 3 = (N >> 8) & 255
Octet 4 = N & 255
Dotted decimal to integer: N = (A × 256³) + (B × 256²) + (C × 256) + D.
CIDR mask: Mask = 0xFFFFFFFF << (32 - prefix). The network address is IP & Mask. The broadcast address is Network | Wildcard.
How to Use This Calculator
- Enter an IPv4 value as an integer, hex value, binary string, dotted decimal address, or CIDR address.
- Select auto detect, or choose the exact input format for stricter parsing.
- Add a CIDR prefix if you need subnet mask and host range details.
- Choose byte order for numeric sources from databases or packet tools.
- Press the convert button. The result appears above the form.
- Use the CSV or PDF button to save the calculated record.
Why Dotted Decimal Conversion Matters
Dotted decimal notation is the common readable form of an IPv4 address. Machines can store the same address as one 32 bit number, four bytes, hexadecimal text, or binary text. A calculator helps convert those forms without mental bit work. It also reduces typing mistakes during network planning.
Better Network Checks
This tool does more than split numbers. It validates every octet. It checks the optional CIDR prefix. It shows the address class, binary form, hexadecimal form, subnet mask, wildcard mask, network address, and broadcast address. These details help when you review router notes, firewall lists, hosting settings, or log exports.
How Numeric Inputs Are Read
An IPv4 address has four octets. Each octet ranges from 0 to 255. The calculator combines those octets into one unsigned value. It can also reverse the byte order for little endian data. That option is useful when a database, packet dump, or old system stores the bytes in a different order.
Practical Use Cases
Developers often see IP addresses as integers in analytics tables. Security teams may receive hexadecimal indicators. Students may need binary examples for subnet lessons. Site owners may need quick checks for control panels. This page covers all those tasks in one simple workflow.
Accuracy And Exports
The result appears above the form after submission. This keeps the answer visible while you adjust inputs. You can download a CSV file for spreadsheet records. You can also create a PDF summary for reports. The example table gives test values, so you can compare known conversions before using your own data.
Subnet Awareness
When you enter a prefix, the calculator adds subnet information. It finds the mask from the prefix length. It applies a bitwise AND to get the network address. It applies the wildcard to get the broadcast address. For small networks, it also shows the usable range. This makes the page helpful for both conversion and planning.
Cleaner Documentation
Consistent notation keeps tickets clear. It also helps teams compare ranges quickly. Saved exports can support audits, migrations, lessons, and troubleshooting notes. Clear results make repeated network work faster and safer for busy teams each day.
FAQs
What is dotted decimal notation?
Dotted decimal notation writes an IPv4 address as four decimal octets separated by periods. Each octet represents one byte and must stay between 0 and 255.
Can this calculator convert an IP integer?
Yes. Enter an unsigned integer from 0 to 4294967295. The calculator splits its 32 bits into four octets and displays the dotted decimal address.
Does it support hexadecimal IP values?
Yes. Use values like 0xC0A80101 or C0A80101. The calculator reads each byte, validates the range, and returns the dotted decimal result.
Can I enter a binary IP address?
Yes. Enter up to 32 bits. For a full IPv4 address, use 32 bits. Spaces, dots, underscores, and dashes are removed before parsing.
What does byte order mean?
Byte order controls how numeric bytes are read. Network order reads the highest byte first. Little endian reads the lowest byte first.
What is the CIDR prefix used for?
The prefix calculates subnet data. It shows the subnet mask, wildcard mask, network address, broadcast address, total addresses, and usable host range.
Can I export the result?
Yes. After conversion, use the CSV button for spreadsheet data. Use the PDF button for a clean report summary.
Why is my input rejected?
The value may exceed IPv4 limits, have an invalid octet, include too many bits, or use a prefix outside the 0 to 32 range.