how does the Hot 100 even work?
a primer on the Hot 100, as well as the Billboard 200 and a few other sources I use to track what's trending
Love them or hate them, the Billboard charts are one of the easiest ways we have to understand what songs and albums are the most popular. When I write my weekly chart roundups breaking down music by the numbers, Billboard tends to be the benchmark I use to compare other data sources (even if I’m often complaining about them). I recently realized I’ve never given a full breakdown of how they work, so with some rule changes kicking in soon, let’s do a good old explainer of how Billboard got started, how the charts have evolved, and how they are calculated today.
History
Today, Billboard is in part a consumer facing publication, but historically it was geared towards industry insiders. Billboard was actually founded in 1894 (not a typo) as an advertising magazine, developing a focus on the entertainment industry. As consumers began to have more regular access to music at home, music became a bigger share of its focus. Billboard published its first chart, “Last Week’s Ten Best Sellers Among The Popular Songs” in 1913 to track the purchase of sheet music. This gave entertainers information about trends that they could use for marketing or crafting their next hit.
Billboard runs dozens of charts today (and has had many more discontinued over the years), but the two mainstay charts are the Hot 100, which tracks songs, and the Billboard 200, which tracks albums. Over time, these charts have evolved through many iterations, names, and structures, but the Hot 100 has run in a generally similar format of 100 songs since 1958 and the Billboard 200 in a similar format of 200 albums since 1967. Throughout most of this time, Billboard was catering to the music industry - while radio shows or music programs may have cited “the most popular songs,” chart-watching as music fans is a pretty recent phenomenon. Think of stan wars on twitter in the early 2010’s, Swifties buying every vinyl variant, or even streaming services like Spotify beginning to publish their own charts for listeners. Today, Billboard publishes these charts with the understanding that they’ll be used not just by label executives but also pop music obsessives (like me) to compare their favorite artists and cheer them on, almost the way sports fans do.
The Billboard Charts: The Basics
Both the Hot 100 and the Billboard 200 share several key features that are important to know. They track music consumption from Friday to Thursday of any given week (so artists trying to chart have incentive to release on Fridays to get a full tracking week). Chart updates are posted on the Tuesday after the period ends and dated the following Saturday, so the January 10th, 2026 chart is posted on Jan. 6th and tracks consumption from Dec. 26th to Jan. 1st.
They also are “multi-metric” charts, meaning that they take inputs from several different sources and combine them in order to rank them. Below, I’ll share the specific sources that each chart uses and how they combine them.
How does the Hot 100 work?
The chart uses three sources of data in combination to determine chart placement: streaming, radio play, and sales numbers.
Streaming: This includes both audio and video streams from a variety of outlets. As of December 2025, Youtube has announced that they will no longer be providing data, meaning Youtube views will no longer count towards the charts.
Sales: Including both digital and physical singles, such as vinyls, tracked across physical stores, digital stores, and direct purchases such as from artists. As an important note, physical sales calculate when the product ships. This means that if an artist surprise drops an album but doesn’t have vinyl prepped, it doesn’t matter which week the customer hits buy, but when the item is sent out.
Radio Play: Billboard works with Mediabase to monitor radio stations in 140 markets, factoring in not only how many times a song was played, but how many people heard it. They use audience ratings to consider the number of people hearing a song at any given time.
While the Billboard 200 chart is very transparent about the formula used to combine metrics, Billboard’s website does not specify how each metric is weighted compared to the others on the Hot 100. Billboard also has certain rules that limit how long songs can stay on the chart known as “recurrent rules.” After a song stops rising and begins to fall, it will automatically drop off rather than hanging out in the middle of the charts on the way down. I wrote a full post about how and why Billboard updated their policies in the fall of 2025 to get songs off the chart more quickly.
How does the Billboard 200 work?
Similarly to the Hot 100, the Billboard 200 focuses on three sources of data. However, each metric has a specified formula that adds up to one Equivalent Album Unit (EAU) encompassing traditional sales, single sales, and streams.
Traditional Sales: The purchase of a copy of an album, either physical or digital. One album sale = one EAU. As with the Hot 100, physical items count as a sale when the product ships, not when the consumer clicks “buy.”
Track Equivalent Albums (TEA): 10 sales of any album track = one EAU. It doesn’t matter how many tracks are on the actual album, or which tracks are being purchased.
Streaming Equivalent Album (SEA): Streams from audio and video both count, but paid or subscription streams count more heavily. 2,500 ad-supported streams = one EAU, while 1,000 paid/subscription streams = one EAU.1 As with tracks, it can be any track from the album. As above, Youtube streams no longer count towards the charts based on Youtube’s decision to stop providing data.
Unlike the Hot 100, each of these three components is simply added up. In addition to the full chart, Billboard typically reports total EAUs for the top 10 via its weekly “chart beat” column, allowing us more direct comparison between weeks and albums.
Other Sources I Use for My Chart Roundups
Part of the theory behind my weekly chart roundups is that the main Billboard charts capture a lot of data, but may not necessarily capture the zeitgeist. In addition to looking at the Hot 100 and Billboard 200 each week, I usually report out on the following other data:
Billboard Global 200: This is worldwide and includes only sales and streams, no radio.
Spotify US Weekly Chart: This is shared directly on Spotify in the app, but I get more detailed data via kworb.net to track total streams and week to week change.
Youtube US Weekly Chart: Another one that I source from Kworb. Especially because it will no longer be counting towards Billboard’s charts, I like to zoom in on this because it tends to vary a lot from Spotify.
r/popheads Chart: reddit.com/r/popheads is such a great music community and calculates their own weekly chart from users who choose to engage. Typically an alt-pop bent, I think this covers something that broader charts don’t, though I weight it pretty lightly.
last.fm: I personally have been using last.fm for almost a decade to track my streaming - it’s like having access to Spotify wrapped year round, plus you can look at longer trends across time. I’d encourage any music fan to give it a try!
Other Data Sources: I used to track TikTok trending sounds, but there was so little correlation with any other charts that there wasn’t really a trend here. Additionally, I briefly toyed with (and would love to reintroduce) Apple Music, however they only share daily charts rather than weekly, which I think is just too apples to oranges (pun intended) to be useful.
Next week I’m planning to do a deeper dive into the background of why Youtube is taking their data out of consideration, and how that’s related to Billboard’s decision to change the paid vs. free stream weighting. If you’re interested in keeping up with the charts, or just want to know what the kids are listening to these days, definitely hit subscribe :)
This is a change taking place with the charts dated January 17th, 2026 and onward. Previously, the formula was 3750 ad-supported or 1250 paid streams.