---
title: BCD - Binary Coded Decimal
slug: bcd-binary-coded-decimal
docTags: 
createdAt: 2023-10-29T10:04:09.937Z
---

In electronic systems, binary-coded decimal (BCD) is a class of binary encodings of decimal numbers where each digit is represented by a fixed number of bits, usually four or eight. Sometimes, special bit patterns are used for a sign or other indications (e.g. error or overflow).

![](https://api.archbee.com/api/optimize/Qn-KnoMlHMwLEOpt8DNF3/bUHp_AMvf-cBHnd-xGlTg_image.png "Binary Coded Decimal")