Which U.S. chart did Metallica's 1991 album, The Black Album, top at number one?

Metallica's 1991 album, The Black Album, topped the U.S. Billboard 200 at number one.

The Billboard 200 ranks albums in the United States using a combination of equivalent album sales, track-equivalent sales, and streaming activity in its modern form. At the time of Metallica's release, the chart was primarily based on album sales. The record's number-one debut showed that the band had moved from a respected thrash-metal act into a mass-market rock force.

The album was Metallica's first release to reach number one on the Billboard 200. It remained highly visible on the chart for years, helped by sustained sales, radio play, touring, and the long-term popularity of its singles.

This chart should not be confused with the Billboard Hot 100, which ranks individual songs. “Enter Sandman” reached number 16 on that singles chart, while the album itself achieved its number-one result on the Billboard 200.