Welcome

Welcome to the site where you can find information about the Hot Adult Contemporary format (also known as Adult Top 40). Here you can learn about the history of the format, links to current charts, chart feats, and more.

Have a look around and let us know what you think.

Please note: This site uses HAC Chart data from the former Radio & Records (1994-2006) and Mediabase (2006-present).  

This site was last updated 9 January 2026, when the All Time Top 100 page was updated. The chart feats page and the One Week Wonders page were also updated.