Is it accurate for very large numbers?

Yes. It calculates with BigInt, so the value stays exact no matter how many digits there are — none of the rounding error you get from ordinary floating point.

Do negative numbers work?

Put a minus sign in front. It is written as a sign plus a magnitude, not as two’s complement.

Why is the binary broken into groups of four?

Four binary digits map exactly onto one hexadecimal digit, so grouping them makes it easy to line the two up by eye.

Number base converter

Name: 진법 변환
Author: KarmoLab

Binary·octal·decimal·hex at once · any base 2–36 · bit count

진법 변환

2·8·10·16진수를 한 화면에서 동시에 변환합니다. 임의 진법(2~36)과 비트 연산도 함께

10진수 (DEC)

16진수 (HEX)

8진수 (OCT)

2진수 (BIN)

1111 1111

임의 진법

밑 36

값

비트 수8 bit

바이트1 byte

1의 개수8

부호 있는 8bit 범위넘침

부호 없는 32bit 범위들어감

변환됨 · 칸을 눌러 그대로 복사하세요.

Convert between number bases — binary, octal, decimal and hexadecimal on one screen. Edit one field and the rest follow, plus any base from 2 to 36 and the bit and byte counts.

How to use it

Type a value into any box
The other boxes convert at the same time
For a custom base, slide the base
Click a box to copy it as is

Common questions

Is it accurate for very large numbers?: Yes. It calculates with BigInt, so the value stays exact no matter how many digits there are — none of the rounding error you get from ordinary floating point.
Do negative numbers work?: Put a minus sign in front. It is written as a sign plus a magnitude, not as two’s complement.
Why is the binary broken into groups of four?: Four binary digits map exactly onto one hexadecimal digit, so grouping them makes it easy to line the two up by eye.

Other tools

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