Glycemia Risk Index (GRI) from CGM
Scores the Glycemia Risk Index (0 to 100) and its zone A to E from the time a CGM spent in four glucose bands.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Time below 54 mg/dL
- 0.5 %
- Time from 54 to 69 mg/dL
- 2.5 %
- Time from 181 to 250 mg/dL
- 22 %
- Time above 250 mg/dL
- 7 %
Result: GRI 36.3 (zone B): hypoglycemia component 2.5, hyperglycemia component 18.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Time below 54 mg/dL (%)
- Time from 54 to 69 mg/dL (%)
- Time from 181 to 250 mg/dL (%)
- Time above 250 mg/dL (%)
- Time from 70 to 180 mg/dL (%)
How this is calculated
Citation
Klonoff DC, Wang J, Rodbard D, et al. A Glycemia Risk Index (GRI) of Hypoglycemia and Hyperglycemia for Continuous Glucose Monitoring Validated by Clinician Ratings. J Diabetes Sci Technol. 2023;17(5):1226-1242. Read the sources: Klonoff 2023 ↗, GRI consensus 2026 ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.