The Billboard charts tabulate the relative weekly popularity of songs and albums in the United States and globally. The results are published in Billboard magazine. Billboard biz, the online extension of the Billboard charts, provides additional weekly charts, as well as year-end charts. The three most important charts are the Billboard Global 200 for songs globally, the Billboard Hot 100 for songs in the United States of America and the Billboard 200 for albums in the United States of America, and other charts may be dedicated to a specific genre such as R&B, country, or rock, or they may cover all genres. The charts can be ranked according to sales, streams, or airplay, and for main song charts such as the Hot 100 or Global 200 (though the latter globally) song chart, all three data are used to compile the charts. For the Billboard 200 album chart, streams and track sales are included in addition to album sales.

The weekly sales and streams charts have been monitored on a Friday-to-Thursday cycle since July 2015; previously it was on a Monday-to-Sunday cycle. Radio airplay song charts, however, follow the Monday-to-Sunday cycle (previously Wednesday-to-Tuesday). The charts are released each Tuesday with an issue date the following Saturday.

History

The first chart published by Billboard was "Last Week's Ten Best Sellers Among The Popular Songs", a list of best-selling sheet music, in July 1913. Other early charts listed popular song performances in theatres and recitals in different cities. In 1928, "Popular Numbers Featured by Famous Singers and Leaders" appeared, which added radio performances to in-person performances. On January 4, 1936, Billboard magazine published its first pop chart based on record sales. Titled "Ten Best Records for Week Ending", it listed the 10 top-selling records of three leading record companies as reported by the companies themselves. In March 1937, the "Songs with the Most Radio Plugs" chart debuted with data from a separate company. In October 1938, a review list, "The Week's Best Records", was retitled "The Billboard Record Buying Guide" by incorporating airplay and sheet music sales, which would eventually become the first trade survey of record popularity.

In the July 27, 1940, issue, the first "Billboard Music Popularity Chart" was published for the week ending July 20, with separate listings covering retail sales, sheet music sales, jukebox song selection and radio play. Among the lists were the 10 songs of the "Best Selling Retail Records", which is the fore-runner of today's pop chart, with "I'll Never Smile Again" by Tommy Dorsey (featuring vocals by Frank Sinatra) its first number one. This best-seller chart (also known as "Best Sellers in Stores" and "Best Selling Pop Singles in Stores") is considered the true guide to a song's popularity until the creation of the Hot 100 in 1958. Another accolade of a successful song was a position on the "Honor Roll of Hits", introduced on March 24, 1945, initially as a 10-song list, later expanded to 30 songs, which ranked the most popular songs by combining record and sheet sales, disk jockey, and jukebox performances as determined by Billboard's weekly nationwide survey. This chart amalgamated different records of the same song by different performers as one, and topping the first chart was "Ac-Cent-Tchu-Ate the Positive".