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DEC to BIN Converter Online

Converting decimal numbers to binary (BIN) is the foundation of computer science. The binary system uses only 0 and 1 to represent data.

number-base
DEC → BIN
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10

Decimal (DEC)

Convert from/to decimal number system

01

Binary (BIN)

Convert from/to binary number system

0x

Hexadecimal (HEX)

Convert from/to hexadecimal number system

0o

Octal (OCT)

Convert from/to octal number system

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DEC to HEX Converter Online HEX to DEC Converter Online BIN to DEC Converter Online OCT to HEX Converter Online OCT to DEC Converter Online

Frequently Asked Questions

The number is repeatedly divided by 2. The remainders (0 or 1) are written in reverse order. For example, 13 in DEC = 1101 in BIN.
Computers work with binary data at the hardware level. Understanding binary is essential for bitwise operations, subnet masks, and low-level programming.
In binary, powers of two look like 1, 10, 100, 1000, etc. — a one followed by zeros. This helps quickly estimate data sizes: 1024 = 10000000000 (10 zeros).