How to Calculate Perceived Stress Scale

What is Perceived Stress Scale?

The Perceived Stress Scale (PSS-10) Calculator measures the degree to which life situations are appraised as stressful over the past month using 10 items, each rated 0-4, producing a widely-used indicator of subjective stress burden.

Formula

TS

Total PSS Score (points (0-40)) — Sum of all 10 items after reverse scoring, indicating overall perceived stress

Qi

Item Score (points (0-4)) — Response to each item: 0=Never, 1=Almost never, 2=Sometimes, 3=Fairly often, 4=Very often

SL

Stress Level (category) — Low (0-13), Moderate (14-26), or High (27-40) perceived stress

Step-by-Step Guide

1. 1Rate 10 items on a 0 (never) to 4 (very often) scale for the past month
2. 2Reverse-score items 4, 5, 7, and 8 (positive items: 4 becomes 0, 3 becomes 1, etc.)
3. 3Sum all 10 items for a total score of 0-40
4. 4Interpret: 0-13 low stress, 14-26 moderate stress, 27-40 high perceived stress

Worked Examples

Common Mistakes to Avoid

• ✕Forgetting to reverse-score items 4, 5, 7, and 8 which are positively worded (feeling confident, on top of things)
• ✕Using PSS scores for diagnostic purposes — the PSS measures subjective stress perception, not psychiatric diagnosis
• ✕Not recognizing that PSS scores are heavily influenced by current circumstances and should be interpreted in context

Frequently Asked Questions