PHQ-9 Depression Calculator
Score the PHQ-9 (Patient Health Questionnaire-9) to assess depression severity and guide treatment recommendations.
Crisis Resources
If you or someone you know is in crisis or experiencing thoughts of self-harm, please reach out immediately. Call or text 988 (Suicide & Crisis Lifeline), text HOME to 741741 (Crisis Text Line), or call 911 for emergencies. You are not alone — help is available 24/7.
Medical Disclaimer
This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. Never disregard professional medical advice or delay seeking it because of results from this tool.
Inputs
Results
Total PHQ-9 Score
0 / 27
Severity
1 (1=None, 2=Mild, 3=Moderate, 4=Mod. Severe, 5=Severe)
How to Use This Calculator
- Rate each of the 9 PHQ-9 questions from 0 (not at all) to 3 (nearly every day) based on your experience over the past 2 weeks.
- The questions cover mood, energy, sleep, appetite, concentration, and thoughts of self-harm.
- Review the Total PHQ-9 Score: 0–4 = minimal, 5–9 = mild, 10–14 = moderate, 15–19 = moderately severe, 20–27 = severe depression.
- Note that a score of 1 or higher on question 9 (self-harm thoughts) always warrants immediate professional evaluation.
- This tool is for informational screening only — consult a mental health professional for diagnosis and treatment.
What each input means
- Little Interest or Pleasure
- 0 = Not at all, 1 = Several days, 2 = More than half the days, 3 = Nearly every day.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersLittle Interest or Pleasure = 0, Feeling Down, Depressed, Hopeless = 0, Trouble Sleeping = 0, Feeling Tired or Little Energy = 0 = 9 input(s) provided
- Calculate Total PHQ-9 ScoreTotal PHQ-9 Score0 = 0
- Calculate SeveritySeverity1 = 1
- Calculate Treatment RecommendationTreatment Recommendation1 = 1
Engine last updated .
Related Calculators
The questions that sit next to this one — chosen by subject, including calculators filed under a different category.
GAD-7 Anxiety Calculator
Score the GAD-7 (Generalized Anxiety Disorder-7) questionnaire to assess anxiety severity from minimal to severe.
Mental HealthBurnout Assessment Calculator
Assess burnout risk across three dimensions — emotional exhaustion, cynicism/depersonalization, and professional efficacy — based on Maslach Burnout Inventory concepts.
Geriatric HealthGeriatric Depression Scale Calculator
GDS-15 depression screening for elderly with severity classification, treatment recommendations, and risk assessment.
Womens HealthPostpartum Depression Screening Calculator
Edinburgh Postnatal Depression Scale (EPDS) scoring tool to screen for postpartum depression symptoms.
Mental HealthACE Score Calculator
Calculate the Adverse Childhood Experiences (ACE) score from 10 categories of childhood trauma to assess long-term health risk.
More in Health & Fitness.