PHQ-9 Depression Calculator

The PHQ-9 Depression Calculator scores the standard Patient Health Questionnaire-9 screening tool. Rate each of the 9 symptom questions based on how often you've been bothered over the last two weeks — from Not at all to Nearly every day. Your total PHQ-9 score, depression severity level, and suggested treatment guidance are returned immediately.

Over the last 2 weeks, how often have you been bothered by this problem?

Over the last 2 weeks, how often have you been bothered by this problem?

Over the last 2 weeks, how often have you been bothered by this problem?

Over the last 2 weeks, how often have you been bothered by this problem?

Over the last 2 weeks, how often have you been bothered by this problem?

Over the last 2 weeks, how often have you been bothered by this problem?

Over the last 2 weeks, how often have you been bothered by this problem?

Over the last 2 weeks, how often have you been bothered by this problem?

Over the last 2 weeks, how often have you been bothered by this problem?

Results

PHQ-9 Total Score

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Depression Severity

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Proposed Treatment Action

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PHQ-9 Item Scores

Results Table

Frequently Asked Questions

What is the PHQ-9 and what does it measure?

The PHQ-9 (Patient Health Questionnaire-9) is a validated 9-item screening tool used to detect and measure the severity of depression. Each item corresponds to one of the nine DSM criteria for major depressive disorder, rated over the past two weeks. It is widely used by clinicians and researchers worldwide.

How is the PHQ-9 score calculated?

The PHQ-9 score is the sum of the responses to all 9 questions. Each question is scored 0 (Not at all), 1 (Several days), 2 (More than half the days), or 3 (Nearly every day), giving a total possible range of 0 to 27.

What do the different PHQ-9 score ranges mean?

Scores of 1–4 indicate minimal depression, 5–9 indicate mild depression, 10–14 indicate moderate depression, 15–19 indicate moderately severe depression, and 20–27 indicate severe depression. A score of 0 suggests no significant depressive symptoms.

What treatment actions are recommended based on PHQ-9 score?

Minimal scores (1–4) typically require watchful waiting. Mild scores (5–9) suggest patient education and re-evaluation. Moderate scores (10–14) may warrant a treatment plan including counseling or medication. Moderately severe to severe scores (15–27) generally recommend active treatment with antidepressants and/or psychotherapy, and referral to a mental health specialist.

Is the PHQ-9 a diagnostic tool for depression?

No. The PHQ-9 is a screening and severity-measurement tool, not a diagnostic instrument. A formal diagnosis of major depressive disorder requires clinical evaluation by a qualified healthcare professional who considers the full clinical picture.

What should I do if I score highly on the PHQ-9?

If your score indicates moderate to severe depression, it is strongly recommended that you speak with a doctor, therapist, or mental health professional as soon as possible. If you are having thoughts of self-harm or suicide (question 9), please seek immediate help by contacting emergency services or a crisis helpline.

How often should the PHQ-9 be taken?

Clinicians often administer the PHQ-9 at initial assessment and then periodically (e.g., every 2–4 weeks) to monitor treatment response and symptom changes over time. For self-screening purposes, retaking it every few weeks can help you track trends.

Can the PHQ-9 be used for adolescents?

The PHQ-9 was originally validated for adults aged 18 and older. A modified version called the PHQ-A exists specifically for adolescents aged 12–17. Results for younger users should always be interpreted by a healthcare professional.

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