Side-by-side comparison helps you choose the right calculator for a specific clinical question.
Mental Health
Quick two-question depression screen using the PHQ-2. A score of 3 or higher suggests further evaluation with the full [PHQ-9](/tools/phq9).
Formula
Total score = sum of 2 items (each 0-3). Range 0-6. Positive screen ≥ 3.
Inputs
Mental Health
Free PHQ-9 depression screening questionnaire. Take the Patient Health Questionnaire-9 to assess depression severity with instant scoring and interpretation. Also screen for anxiety with [GAD-7](/tools/gad7).
Formula
Total score = sum of all 9 items (each 0-3). Range 0-27.
Inputs