Comparing "dou" and "quan"

都 (dōu) and 全 (quán) both are adverbs that mean "all." Sometimes they can be used interchangeably, and sometimes they can even be used together as 全部 (quán dōu). Both words are used in informal and formal settings. Only 都 can also be used to mean "(not) at all" (usually used in the negative for emphasis) or "already." Only 全 can be used as an adjective to mean "complete" or "entire."

B1HSK3ASV4567

	都 (dōu)	全 (quán)
Meaning	all; at all; already	all; complete, entire
Part of Speech	adverb	adverb, adjective
Formality	flexible	flexible

:Yes

Both 都 (dōu) and 全 (quán) are adverbs that can mean "all"

• 都吃完了。
• 全吃完了。

都 (dōu) can mean "already"

• 都6点了！

都 (dōu) can intensify negatives

• 我一点都不想和他做朋友。

都 appears in quite a lot of grammar patterns, so you'll want to get familiar with those on the Chinese Grammar Wiki.

全 can be used as an adjective to mean "complete" or "entire"

全天 全套 全公司 全国 全世界

For added emphasis, use them together as 全都

• 全都吃完了。

Sources and further reading

Websites

对外汉语教学：怎么区别“都”和“全”？ - Chinese Fever的文章 - 知乎 https://zhuanlan.zhihu.com/p/215968679