ISIPast 2 weeksAbout 2 minutes 👥 No usage yetSource: Morin CM (1993)

Insomnia Severity Index

The ISI is a widely used tool for assessing insomnia severity and monitoring CBT-I treatment outcomes. It contains 7 items with a total score of 0–28.

What this scale measuresThe ISI screens for insomnia severity in adults over the past two weeks, covering sleep onset, night awakenings, early morning awakening, sleep satisfaction, and daytime impairment. It is the international standard for insomnia screening and for monitoring CBT-I (cognitive behavioral therapy for insomnia) outcomes, helping you decide whether you need a professional evaluation.
How to read your score
  • Severe insomnia0 – 7

    Severe insomnia that significantly affects quality of life. Please seek medical care promptly.

  • Mild insomnia8 – 14

    Mild insomnia symptoms that may slightly affect daytime functioning.

  • Moderate insomnia15 – 21

    Insomnia symptoms are noticeable. Consider seeking a professional evaluation.

  • Severe insomnia22 – 28

    Severe insomnia that significantly affects quality of life. Please seek medical care promptly.

These ranges are for screening reference only and cannot replace a professional diagnosis.

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Important: This result is for self-screening only

All scales on this site are publicly available academic screening tools, not medical devices, and do not constitute a clinical diagnosis. Results are affected by mood, routine, environment, and physical condition.

  • Scale results cannot be used as the sole basis for diagnosis, medication, treatment, or prescription.
  • Do not self-diagnose or self-medicate based solely on scale scores.
  • If you have physical, mental, sleep, or emotional concerns, please consult a qualified healthcare provider.

Users assume full responsibility for any medical or wellness decisions based on these results.