Age: 6-8 months

Q: When should my baby start crawling?

Answer: Most babies start crawling sometime between the age of 7 and 10 months, but every baby is unique so your little one may be on the move a little earlier or later than this. Keep in mind that some babies don't crawl in the classic sense at all, but rather get around by shuffling on their bottom.

Source: https://www.whattoexpect.com/first-year/crawling/