For how many consecutive weeks did Metallica's 1991 self-titled album top the Billboard 200?

Metallica's 1991 self-titled album topped the Billboard 200 for four consecutive weeks.

The record debuted at number one in the United States, making it Metallica's first album to reach the summit of the main American album chart. Its immediate performance was especially notable because the band had previously been associated primarily with the underground and specialist heavy-metal audience.

The four-week run is sometimes confused with the album's much longer overall chart life. Metallica remained on the Billboard 200 for hundreds of weeks and became one of the longest-charting albums of the Nielsen SoundScan era, but only its uninterrupted number-one period lasted four weeks.

The chart achievement reflected both the strength of the singles and the band's expanding audience. "Enter Sandman," "The Unforgiven," "Nothing Else Matters," "Wherever I May Roam," and "Sad but True" all helped sustain attention. The album's commercial scale also made it a defining release of early-1990s rock.