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Sleep scores may be one of the most-checked metrics in wearable health tracking, but the companies behind them haven’t agreed on a shared language. A Garmin wearer with a 75 is in “Fair” territory. An Oura wearer with a 75 is doing “Good.” An Apple Watch user with a 75 might see “OK” or “High” depending on which software version they’re running. Where are these numbers coming from, and what are they actually telling you?
Each platform uses different scales, labels, and underlying signals to arrive at that single morning number. Here’s a breakdown of how the most popular wearables calculate your “sleep score,” and what that score means for you.
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