Sleep Score summarizes how well last night met your personal sleep need. It blends duration, timing relative to your chronotype, and continuity so you get one number that reflects restorative sleep—not just hours in bed.
We compare time asleep and sleep efficiency against your estimated need, then adjust for major disruptions (long wake episodes, very late bedtimes) that blunt recovery even when totals look fine.
Treat Sleep Score as a daily check-in: high scores mean you banked solid recovery for cognition and metabolism; repeated lows are a signal to protect wind-down, consistency, and morning light—not to chase a perfect 100 every night.
Pair Sleep Score with Recovery Score (readiness) and Strain Score (load). Sleep feeds recovery; strain tells you whether today's demands match what last night could support.