CDR Sum of Boxes (dementia staging)
Clinical Dementia Rating — Sum of Boxes: six boxes (memory, orientation, judgment, community, home & hobbies 0/0.5/1/2/3; personal care 0/1/2/3) summed 0–18, with O'Bryant global-CDR staging.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Memory
- 1
- Orientation
- 1
- Judgment
- 0.5
- Community
- 1
- Home
- 1
- Personal Care
- 0
Result: CDR-SOB 4.5/18 — mild (CDR 1).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- 0
- No dementia (global CDR 0).
- 0.5–4.0
- Questionable to very mild (CDR 0.5).
- 4.5–9.0
- Mild (CDR 1).
- 9.5–15.5
- Moderate (CDR 2).
- 16.0–18.0
- Severe dementia (CDR 3).
What you enter
- Memory
- Orientation
- Judgment
- Community
- Home
- Personal Care
How this is calculated
Morris JC. The Clinical Dementia Rating (CDR): current version and scoring rules. Neurology. 1993;43(11):2412-2414. Staging ranges: O'Bryant SE, Waring SC, Cullum CM, et al. Arch Neurol. 2008;65(8):1091-1095. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.