Depression Screening (PHQ-9) Calculator

PHQ-9 is a validated screening tool. This is NOT a diagnosis — if you're concerned, speak with a doctor or mental health professional.

How the Math Works

The PHQ-9 Depression Screening Calculator uses a standardized questionnaire consisting of 9 questions that correspond to the diagnostic criteria for major depressive disorder as outlined in the DSM-5. Each question asks about the frequency of specific symptoms over the past two weeks, with responses ranging from 0 (not at all) to 3 (nearly every day). The scores from all 9 items are simply added together to produce a total score ranging from 0 to 27, with higher scores indicating more severe depressive symptoms.

Practical Applications

To use this calculator, answer all 9 questions honestly based on how you have felt during the past two weeks. Simply select the response that best matches your experience for each symptom, then the calculator will automatically sum your responses to provide a total score. This score can help you gauge the severity of your depressive symptoms and determine whether you should consider speaking with a healthcare professional about your mental health.

Day-to-Day Use

Knowing your PHQ-9 score can be valuable in everyday life by helping you monitor changes in your mood and energy levels over time. If your score is in the moderate to severe range, this information can empower you to seek appropriate support from a doctor, therapist, or counselor. The calculator also serves as a useful tool for tracking whether your symptoms improve or worsen with treatment, helping you and your healthcare provider make informed decisions about your mental health care plan.

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