N-base Number Converter

Convert between binary, octal, decimal, hexadecimal, and any base from 2 to 36

Features

Display major 4 bases in a list

Show results for binary, octal, decimal, and hexadecimal side by side as you input

Freely specify bases 2 to 36

Choose the input base and additional bases to display from 2 to 36

Support multiple values and large integers

Convert multiple values at once using delimiters, with no errors for negative numbers or many-digit integers

Adjust notation for code

Toggle between uppercase and lowercase letters, and switch prefixes 0b, 0o, 0x on or off

How to Use

1

Select the input base

In "Input base", choose what base your input value is from 2 to 36 (default is decimal)

2

Enter the integer to convert

Type an integer in the input field. Separate by line break, comma, or space to convert multiple values at once

3

Adjust display and notation

As needed, change "Additional bases to display", letter notation, and prefix visibility

4

Copy the line you need

From the results lined up in blocks for each value, click the copy button for the base you want to use

N-base Number Converter

Use Cases

Check flag values and addresses

Convert hexadecimal flag values or memory addresses to decimal or binary to verify program behavior

Answer check for base conversion problems

Verify multiple base conversion results you calculated by hand in the Information Technology Engineer Exam or computer science class

Check IP address bits

Line up each octet of a subnet mask or IP address in binary to check network configuration

Read and convert base 36 IDs

Interchange IDs expressed as base 36 and decimal IDs to verify data

Basic Knowledge

What is a base (N-base number)?

A base is the number of digits that can be used in one digit place. In base N, numbers are represented using N types of digits from 0 to N−1, and the value increases by a factor of N with each higher digit place. For example, 255 in decimal is 11111111 in binary and FF in hexadecimal.

  • Why base 36 is the upper limit:To represent values of 10 or more with a single digit, letters A through Z are assigned in order. Since there are 10 digits and 26 letters, base 36 (where Z represents 35) is the general upper limit of notation.

Meaning of prefixes 0b, 0o, 0x

0b, 0o, and 0x are symbols added to the beginning of numbers in programming languages to indicate what base the number is written in.

  • 0b (binary):0b is a prefix taken from the first letter of binary. 0b1010 represents 10 in decimal.
  • 0o (octal):0o is a prefix taken from the first letter of octal. 0o17 represents 15 in decimal.
  • 0x (hexadecimal):0x is a prefix derived from hexadecimal. 0xFF represents 255 in decimal.

How to express negative numbers

Negative numbers are expressed in two ways: signed notation with a minus sign (−) at the beginning, and two's complement notation where they are expressed within a fixed number of bits.

  • Signed notation:In signed notation, negative numbers like −255 are written with a sign before the positive representation: −11111111 in binary or −FF in hexadecimal.
  • Two's complement:Two's complement is the method computers use internally to handle negative numbers. In 8-bit two's complement, −1 is 11111111, so the same bit pattern has a different meaning than in signed notation.

Safety and Privacy

Tapos sa browser

Ang inilagay na data ay pinoproseso lamang sa loob ng iyong browser at hindi ipinapadala sa labas.

Proseso lamang sa loob ng browser

Conversion processing ay ginagawa nang lubusan sa loob ng iyong browser, at ang mga input data ay hindi ipinapadala sa server.

Ang komunikasyon ay naka-encrypt gamit ang HTTPS

Ang pagkarga ng pahina ay naka-encrypt din ng TLS, at ang nilalaman ay hindi mababasa ng third party.

Walang pagpapadala sa third party

Ang mga input content ay hindi ipinapadala sa mga external na serbisyo tulad ng advertising network o tracker.

Input numbers are not saved

Settings are saved only within the browser on this device; input numbers are not saved

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