Number Base Converter

NumbersNew

Type in any base and instantly see the value in all others. Binary, octal, decimal, and hex with bit-width representations and signed/unsigned info.

Binarybase 2

Octalbase 8

Decimalbase 10

Hexadecimalbase 16

Type a number in any field to convert instantly

Number info

Enter a number to see bit info

Works great for

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Debugging bit values

Instantly convert decimal error codes and status flags to binary or hex while stepping through a debugger. Spot sign bits, overflow conditions, and bitmask patterns without leaving your browser.

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Embedded & hardware engineering

Translate register addresses and memory-mapped I/O values between hexadecimal and binary during firmware development. Verify 8-bit, 16-bit, and 32-bit unsigned ranges in one step.

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Learning number systems

Students mastering binary, octal, decimal, and hex conversion can type into any field and watch all bases update in real time. The bit-length panel reinforces how values fit into different container sizes.

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Data science hex inspection

Inspect raw hex values from binary data files, network captures, or database BLOBs by converting them to decimal or binary for analysis. Ideal when working with packed integer formats in NumPy or pandas.

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Network & IP address work

Convert IPv4 subnet masks and CIDR components between decimal and binary to visualise host and network bit boundaries. Verify octal file-permission values when scripting Linux network configurations.

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Teaching CS fundamentals

Instructors can demonstrate two's complement, sign extension, and bitwise operations live using the binary representations panel. The grouped-bit display makes 8-bit vs 32-bit representation immediately clear.

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Frequently asked questions

How do I convert a number from decimal to binary?

Type the decimal value into the decimal field and the binary, octal, and hexadecimal equivalents update immediately alongside it. The tool also shows the bit-width representation, such as 8-bit or 16-bit, for the value.

Does the converter support hexadecimal and octal, not just binary?

Yes. It converts simultaneously between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16), so typing into any one field updates all the others.

Is there a size limit on the numbers this tool can convert?

The converter works reliably for standard 8-bit, 16-bit, and 32-bit integer ranges and shows the unsigned bit representation for the value you enter. Extremely large numbers beyond 32-bit precision may not display correctly.

What does the bit-width label like "16-bit" mean on this tool?

It indicates the smallest standard integer size, 8, 16, or 32 bits, that can hold your entered value in binary. This helps developers judge how a number would be stored in memory or a data type.