Insomnia Severity Test: ISI Online Assessment
Answer seven clinically validated questions to receive your Insomnia Severity Index score, a breakdown of your sleep symptoms across three key dimensions, and guidance on the most appropriate next steps.
📋 Insomnia Severity Index (ISI)
Rate each item based on your experience over the past two weeks.
Answer all questions to see your score and dimension breakdown.
The ISI is a screening tool, not a clinical diagnosis. Seek professional evaluation for chronic insomnia.
What Is the Insomnia Severity Index?
The Insomnia Severity Index (ISI) is a brief, validated questionnaire designed to assess the severity of insomnia. Developed by Dr. Charles Morin and colleagues, it's one of the most widely used screening tools in both clinical practice and research. Our online insomnia severity index calculator lets you complete the same 7‑item scale and instantly receive a score with interpretation.
Unlike a simple do i have insomnia quiz, the ISI measures not just the symptoms themselves but also how much they interfere with your daily life, how noticeable they are to others, and how distressed you feel about your sleep problem. This makes it particularly useful for distinguishing between occasional sleeplessness and chronic insomnia assessment that may require professional help.
ISI Score Ranges & Classification
The 7 ISI Questions & Three Dimensions
The questionnaire covers three core domains of insomnia: difficulty falling asleep (sleep onset insomnia test), difficulty staying asleep, and waking up too early. It also gauges satisfaction with sleep, how much the problem interferes with daytime functioning, whether others have noticed, and the level of worry or distress caused by the sleep difficulties.
Domains Assessed by the ISI
Nighttime Symptoms
Onset · Maintenance · Early waking
(Q1–Q3, max 12 pts)
Sleep Satisfaction
Overall satisfaction with sleep
(Q4, max 4 pts)
Daytime Impact & Distress
Interference · Noticeability · Worry
(Q5–Q7, max 12 pts)
Scoring and Interpretation
After you complete the insomnia test online, your total score (0–28) falls into one of four categories. The original validation study by Morin et al. (2011) showed that a cutoff of 10 provides good sensitivity for detecting clinically significant insomnia. Our enhanced version also breaks down your score into three clinically meaningful dimensions, giving you a clearer picture of where your sleep struggles are concentrated.
| Score | Severity | Typical Impact |
|---|---|---|
| 0 – 7 | No clinically significant insomnia | Normal sleep variation; no treatment needed. |
| 8 – 14 | Subthreshold insomnia | Mild sleep disruption; may benefit from sleep hygiene improvements. |
| 15 – 21 | Moderate insomnia | Noticeable daytime impairment; consider CBT‑I or medical consultation. |
| 22 – 28 | Severe insomnia | Significant distress; professional evaluation strongly recommended. |
What Your Score Means & Next Steps
If your score suggests moderate or severe insomnia, it's important to remember that effective treatments exist. Cognitive Behavioral Therapy for Insomnia (CBT‑I) is the first‑line recommendation, often producing lasting results without medication. For many, simply understanding their chronic insomnia assessment results is the first step toward taking action.
Effectiveness of CBT‑I (Remission Rates)
Approximate remission rates after 6‑8 weeks. CBT‑I addresses underlying behaviors and thoughts.
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📚 Based on Morin, C. M., et al. (2011). Insomnia Severity Index. 📅 Last updated:
The ISI is a screening tool, not a clinical diagnosis. Consult a healthcare professional for persistent sleep difficulties.