The Dark Side of the Moon was a commercial and critical success . It topped the Billboard Top LPs & Tapes chart for a week and remained in the chart for 741 weeks from 1973 to 1988 . After the rules were changed in 2009 , the album re-entered the chart and eventually topped out at 937 total weeks . With an estimated 45 million copies sold , it is Pink Floyd 's most successful album and one of the best - selling worldwide . It has been remastered and re-released several times , and covered in its entirety by several acts . It produced two singles , `` Money '' and `` Us and Them '' . It is often ranked as one of the greatest albums of all time .

Question: how long was dark side of the moon number 1
Answer: a week