Continuous Glucose Monitor Calculator

CGM data interpretation: time in range and GMI.

Medical Disclaimer

This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. Never disregard professional medical advice or delay seeking it because of results from this tool.

Inputs

Mean Glucose (mg/dL)

Glucose SD (mg/dL)

Time in Range 70–180 (%)

Time Below Range <70 (%)

Tab to move between fields

Results

GMI (%)

6.99

Estimated A1c (%)6.99

Coefficient of Variation (%)26

Time Above Range >180 (%)27

Variability Rating (0–2)0

CGM Score (0–100)65

How to Use This Calculator

Enter Mean Glucose (mg/dL) and Glucose Standard Deviation from the CGM report.
Input Time in Range 70-180 % and Time Below Range < 70 %.
Enter Glucose Management Indicator (GMI) from the device software.
Review Estimated A1c, Coefficient of Variation (CV), and Variability Rating.
A CV below 36% and Time in Range above 70% indicate stable glucose management.

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