Side-by-side comparison helps you choose the right calculator for a specific clinical question.
Mental Health
Free GAD-7 anxiety screening questionnaire. Take the Generalized Anxiety Disorder 7-item scale to assess anxiety severity with instant scoring and interpretation. Also screen for depression with [PHQ-9](/tools/phq9).
Formula
Total score = sum of all 7 items (each 0-3). Range 0-21.
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