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PHQ-9 (Depression)

PHQ-9 (Depression): calculated with the published clinical method, with result interpretation. A reference tool that does not replace a doctor's advice.

ℹ Reference calculation based on the published method. It does not replace a clinical examination or a doctor's decision.

PHQ-9 (Depression)

1. Little interest or pleasure in doing things
2. Feeling down, depressed or hopeless
3. Trouble sleeping or sleeping too much
4. Feeling tired or having little energy
5. Poor appetite or overeating
6. Feeling bad about yourself or guilty
7. Trouble concentrating
8. Moving or speaking slowly, or being fidgety and restless
9. Thoughts of death or self-harm
PHQ-9
9points
0 = not at all, 1 = several days, 2 = more than half the days, 3 = nearly every day (past 2 weeks)Screening, not a diagnosisPHQ-9 (Depression): calculated with the published clinical method, with result interpretation. A reference tool that does not replace a doctor's advice.
Depression severity
Mild
Warning
Thoughts of self-harm — please contact a professional

More about: PHQ-9 (Depression)

What it calculates

The “PHQ-9 (Depression)” calculator computes PHQ-9 in points from 9 parameters: 1. little interest or pleasure in doing things, 2. feeling down, depressed or hopeless, 3. trouble sleeping or sleeping too much, 4. feeling tired or having little energy, 5. poor appetite or overeating, 6. feeling bad about yourself or guilty, 7. trouble concentrating, 8. moving or speaking slowly, or being fidgety and restless, 9. thoughts of death or self-harm.

Used by professionals and patients to assess health metrics, dosages, and risks.

Example calculation

With parameters 1. Little interest or pleasure in doing things = 1, 2. Feeling down, depressed or hopeless = 1, 3. Trouble sleeping or sleeping too much = 1, 4. Feeling tired or having little energy = 1, 5. Poor appetite or overeating = 1, 6. Feeling bad about yourself or guilty = 1, 7. Trouble concentrating = 1, 8. Moving or speaking slowly, or being fidgety and restless = 1, 9. Thoughts of death or self-harm = 1 the result is 9 points (0 = not at all, 1 = several days, 2 = more than half the days, 3 = nearly every day (past 2 weeks)).

How to use

  1. Enter 1. little interest or pleasure in doing things, 2. feeling down, depressed or hopeless, 3. trouble sleeping or sleeping too much, 4. feeling tired or having little energy, 5. poor appetite or overeating, 6. feeling bad about yourself or guilty, 7. trouble concentrating, 8. moving or speaking slowly, or being fidgety and restless and 9. thoughts of death or self-harm — each field above is adjustable with a slider.
  2. PHQ-9 (points) is calculated automatically as you type.
  3. Check the worked example below to see the formula applied to real numbers.
  4. Copy the result or bookmark this calculator.

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FAQ

How is BMI calculated?
BMI = weight (kg) / height (m)². Example: 70 kg / (1.75 m)² = 22.9. The WHO normal range is 18.5–24.9; below that is underweight, 25–29.9 is overweight, and 30+ is obese.
Is BMI accurate for everyone?
No. BMI does not distinguish muscle from fat, so athletes may show a high BMI with low body fat. It is also less reliable for teenagers, pregnant people, older adults, and very tall or short individuals.
What are the BMI categories?
Underweight: below 18.5. Normal: 18.5–24.9. Overweight: 25–29.9. Obese class I: 30–34.9; class II: 35–39.9; class III: 40+.
What is a better measure than BMI?
Body fat percentage, waist-to-height ratio (aim for under 0.5), and waist circumference give a clearer picture of health than BMI alone.

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