Perceived Stress Score Calculator (PSS-10)
The Perceived Stress Scale (PSS-10) is one of the most widely used and validated tools for measuring subjective stress. It was developed by Sheldon Cohen, Tom Kamarck, and Robin Mermelstein and first published in the Journal of Health and Social Behavior in 1983. The 10-item version measures the degree to which situations in your life over the past month have felt unpredictable, uncontrollable, or overwhelming. Scores range from 0 to 40. Answer each question by selecting how often you felt that way during the last month. Reversed items (marked with an asterisk) are scored in the opposite direction. This tool is educational only and is not a clinical diagnostic instrument.
* Reversed items: higher ratings = lower stress score
PSS-10 scoring method
Score each item 0 (Never) to 4 (Very often).
Reverse-score items 4, 5, 7, 8 (4 becomes 0, 3 becomes 1, 2 stays 2, etc.).
Sum all 10 items. Range 0-40. Low: 0-13; Moderate: 14-26; High: 27-40.
PSS-10 stress scale: frequently asked questions
What is the Perceived Stress Scale (PSS-10)?
The PSS-10 is a validated psychological questionnaire developed by Sheldon Cohen, Tom Kamarck, and Robin Mermelstein in 1983. It measures the degree to which situations in your life over the past month have been appraised as stressful. It is one of the most widely used psychological instruments for measuring perceived stress and has been validated in numerous populations worldwide.
How do I interpret my PSS-10 score?
PSS-10 scores range from 0-40. General population norms (Cohen et al.): 0-13 = low perceived stress; 14-26 = moderate perceived stress; 27-40 = high perceived stress. Scores above 27 are associated with a significantly elevated risk of stress-related health problems. Women tend to score slightly higher than men on population averages. Scores can change over time and with intervention.
Is the PSS-10 a diagnostic tool?
No. The PSS-10 measures perceived stress at the population level and in research settings. It is not a diagnostic instrument for any mental health condition. A high score suggests that stress-management strategies may be beneficial, but it does not diagnose anxiety disorder, depression, or any other clinical condition. If you are concerned about your mental health, please speak with a qualified healthcare professional.
How can I reduce my stress score?
Evidence-based stress reduction strategies include: mindfulness meditation (MBSR reduces PSS scores by 4-6 points in clinical trials), regular aerobic exercise (reduces cortisol and improves mood), adequate sleep (7-9 hours/night for adults), social connection, nature exposure, progressive muscle relaxation, and cognitive-behavioural therapy (CBT). Small consistent lifestyle changes can meaningfully lower perceived stress over weeks to months.
How often should I take the PSS?
The PSS-10 asks about the past 30 days. Researchers typically administer it monthly or at baseline and follow-up. For personal tracking, taking it monthly gives a useful picture of how your perceived stress changes over time, especially if you are implementing stress-reduction interventions. Daily use is not recommended as the scale is designed for monthly assessment.
Official sources
- Cohen S, Kamarck T, Mermelstein R: A Global Measure of Perceived Stress (Journal of Health and Social Behavior, 1983).
- NIH National Cancer Institute: Psychological Stress and Cancer - Fact Sheet.
Reviewed by the CalculatorHub team, edited by James Graham, 14 June 2026. See our methodology.