Which chart did Metallica top for four consecutive weeks in 1991?

Metallica topped the Billboard 200 for four consecutive weeks in 1991.

The Billboard 200 ranks albums and extended releases in the United States. Metallica debuted at number one on the chart, making it the band’s first album to reach the top position there. It remained at number one for four straight weeks after its August 1991 release.

The album’s opening week was exceptionally strong, with about 598,000 copies sold in the United States. Its success was not limited to America: the record also debuted at number one in ten countries and topped national charts including those of the United Kingdom, Australia, Canada, Germany, and Sweden.

The Billboard Hot 100 is a singles chart, so it is not the correct answer. Individual Black Album songs appeared on singles charts, but the four-week achievement belongs to the album chart. The record later became the best-selling album of the Nielsen SoundScan era in the United States.