The K10 (Kessler Psychological Distress Scale) is a widely used 10-item screening tool that measures non-specific psychological distress over the past four weeks. Clinicians, researchers, and mental health professionals use it to get a quick snapshot of how often someone has experienced symptoms such as fatigue, nervousness, hopelessness, restlessness, depression, and worthlessness. Each item is rated on a five-point scale, giving a total score between 10 and 50.
This K10 Score Calculator lets you select answers for all ten questions, instantly totals your score, and places it on the standard low, moderate, high, and very-high ranges. It is helpful for psychology students, healthcare staff running screenings, researchers scoring surveys, and anyone wanting a structured read on their current mental state. The tool includes a short interpretation and practical guidance for each range.
Important: the K10 is a screening instrument, not a diagnostic test. It cannot diagnose anxiety, depression, or any other condition. If your score is high or you are concerned about your wellbeing, please speak with a qualified healthcare or mental health professional.
📋 K10 Psychological Distress Scale
Rate how often each symptom has applied to you over the past 4 weeks, then press Calculate.
Select answers for all 10 questions and press Calculate.
How to Use This Tool
Select the response that matches how often each symptom applied during the past four weeks. Each item uses the same five-point scale: 1 – None of the time, 2 – A little of the time, 3 – Some of the time, 4 – Most of the time, and 5 – All of the time. After answering all ten questions, press Calculate Score. The tool adds your answers and shows your total, average item score, and distress category. Use the shortcut buttons to fill all items with the same response for quick practice.
How the Score Is Calculated
The K10 total is simply the sum of all ten item values, so the minimum possible score is 10 (all answers are 1) and the maximum is 50 (all answers are 5). Because the scale is non-specific, a higher score indicates a greater overall level of psychological distress, not a specific diagnosis. The score is commonly grouped into four categories:
- 10–19: Low distress
- 20–24: Moderate distress
- 25–29: High distress
- 30–50: Very high distress
Worked Example
Suppose you respond with mostly a 2 (A little of the time) on four items, a 3 (Some of the time) on four items, and a 4 (Most of the time) on two items. Total = (4 × 2) + (4 × 3) + (2 × 4) = 8 + 12 + 8 = 28. A score of 28 falls in the high distress range (25–29).
Common Mistakes to Avoid
Answer every item — a single blank will stop the calculation. Also avoid changing the response labels: the K10 uses frequency anchors (none of the time to all of the time), not severity anchors, so keep the past-four-week time frame in mind. Do not treat the total as a way to compare one person's distress against another's; it is designed for screening and research, not ranking individuals.
Reference Data
Interpretation bands in common use include those from the K10 scale described by Kessler and colleagues. These are useful for placing a score in context:
| Score Range | Category | Suggested Action |
|---|---|---|
| 10–19 | Low | No action usually required; general wellbeing practices help. |
| 20–24 | Moderate | Monitor symptoms; consider discussing with a GP if persistent. |
| 25–29 | High | A professional assessment is recommended. |
| 30–50 | Very high | Seek support soon; contact a healthcare professional or crisis service. |
Frequently Asked Questions
Can I use my K10 score to diagnose depression or anxiety? No. The K10 is a screening measure that identifies the likelihood of current distress, not a diagnostic instrument. A clinician uses a structured interview and additional information before making any diagnosis.
Does a low score mean I have no mental health concerns? Not necessarily. The K10 asks only about the last four weeks and covers a limited set of symptoms. If you are worried about your wellbeing, it is always worth speaking with a professional regardless of your score.
Is the K10 free to use? The K10 is in the public domain and widely used in population surveys such as the World Health Organization's World Mental Health surveys and the Australian Bureau of Statistics' national health surveys. Learn more about the scale's development and use on Wikipedia.