2010 ACR/EULAR Classification Criteria — Rheumatoid Arthritis is a classification tool commonly applied in Rheumatology. Joint involvement, serology, acute-phase reactants, and symptom duration scoring; ≥6 supports definite RA classification. Use the interactive calculator for inputs, limitations, and primary references.

Not a substitute for clinical judgment. Verify critical values with primary literature, local protocols, and specialist input when appropriate.