Insomnia Severity Index (ISI)
Insomnia Severity Index (ISI; Bastien 2001): seven items each 0-4, summed to 0-28.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Difficulty falling asleep
- 3 (severe)
- Difficulty staying asleep
- 3 (severe)
- Waking up too early
- 2 (moderate)
- Dissatisfaction with sleep pattern
- 2 (moderate)
- How noticeable to others
- 2 (moderate)
- Worry / distress about sleep
- 2 (moderate)
- Interference with daily functioning
- 2 (moderate)
Result: ISI 16 of 28 — moderate insomnia.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Bands
- 0-7 none, 8-14 subthreshold, 15-21 moderate, 22-28 severe. >= 15 correlates with clinical insomnia.
What you enter
- Difficulty falling asleep (0-4)
- Difficulty staying asleep (0-4)
- Waking up too early (0-4)
- Dissatisfaction with sleep pattern (0-4)
- How noticeable to others (0-4)
- Worry / distress about sleep (0-4)
- Interference with daily functioning (0-4)
How this is calculated
- Items
- difficulty falling asleep, staying asleep, waking early, dissatisfaction, noticeability, worry, interference - each 0-4 = 0-28.
Bastien CH, Vallieres A, Morin CM. Validation of the Insomnia Severity Index as an outcome measure for insomnia research. Sleep Med. 2001;2(4):297-307. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.