Sleep Score Test

A sleep score is a single number — typically 0 to 100 — that summarises how restorative your last night of sleep was. Consumer wearables like Oura Ring, Fitbit, and WHOOP popularised the concept, but you don't need a device to get meaningful feedback. This quiz uses the same four domains those devices measure and translates your self-reported experiences into an evidence-based score.

The four domains are weighted to reflect their relative impact on next-day cognitive performance and long-term health: Duration (30%), Efficiency (25%), Quality (25%), and Hygiene (20%).

Duration (0–30 pts) — The National Sleep Foundation recommends 7–9 hours for adults. Scores peak at 8 hours and decline symmetrically for both under and over-sleeping. Chronic short sleep (under 6 hours) is associated with increased risk of cardiovascular disease, obesity, and impaired immune function.

Efficiency (0–25 pts) — Sleep efficiency combines two factors: how quickly you fell asleep (sleep onset latency) and how many times you woke up. Healthy sleep onset is under 20 minutes. Multiple awakenings fragment sleep architecture, reducing the proportion of deep and REM sleep.

Quality (0–25 pts) — This domain captures your subjective experience: how rested you feel on waking and how deep your sleep felt. Research consistently shows that subjective sleep quality correlates strongly with objective measures like heart rate variability and slow-wave sleep duration.

Hygiene (0–20 pts) — Sleep hygiene practices — screen exposure, caffeine timing, and schedule consistency — have an outsized impact on sleep quality relative to the effort required to improve them. This domain rewards good pre-sleep habits that support natural melatonin release and circadian rhythm stability.

The most impactful change most people can make is fixing their sleep schedule. Going to bed and waking at the same time every day — including weekends — anchors your circadian rhythm and improves every metric within two weeks.

For those scoring low on Efficiency, the key is stimulus control: reserving your bed only for sleep, and getting out of bed if you can't fall asleep within 20 minutes. This cognitive-behavioural technique (CBT-I) is the gold-standard treatment for insomnia and outperforms sleep medication in long-term studies.

Low Hygiene scores respond quickly to two specific changes: eliminating caffeine after 2 PM (accounting for its 5–7 hour half-life) and cutting screen exposure in the 60 minutes before bed. Both changes typically improve subjective sleep quality within the first week.

If your Duration score is low despite adequate time in bed, consider whether sleep apnea, restless legs syndrome, or another sleep disorder may be causing fragmented sleep. A sleep study can diagnose these conditions, and effective treatments exist for all of them.