# BCD

Updated: 04/26/2017 by Computer Hope

Short for **binary-coded decimal**, **BCD** is also known as **packet decimal** and is numbers 0 through 9 converted to four-digit binary. Below is a list of the decimal numbers 0 through 9 and the binary conversion.

Decimal | BCD |
---|---|

0 | 0000 |

1 | 0001 |

2 | 0010 |

3 | 0011 |

4 | 0100 |

5 | 0101 |

6 | 0110 |

7 | 0111 |

8 | 1000 |

9 | 1001 |

Using this conversion, the number 25, for example, would have a BCD number of 0010 0101 or 00100101. However, in binary, 25 is represented as 11001.

BCD was used in some of the early decimal computers, and the IBM System/360 series systems.