The Social Jetlag Test (SJL) calculates the difference between your biological and social sleep rhythm based on your usual sleep and wake times on weekdays and weekends.
The greater this difference, the stronger the disruption to your body — similar to the effect of crossing time zones.
This test is intended for self-completion. The result is not a medical diagnosis and does not replace consultation with a specialist.
If you're more concerned about anxiety or tension, our anxiety test may help. If you're more concerned about low mood or lack of energy, our depression test may help.