Your Readings

Ranges based on standard targets: 70-180 mg/dL (3.9-10.0 mmol/L)  *  Leave blank to auto-calculate from total

Your Result

Enter your total readings and in-range count above to see your Time in Range breakdown.

How This Works

Time in Range is calculated as the percentage of total readings that fall within the target glucose range (70-180 mg/dL / 3.9-10.0 mmol/L):

TIR (%) = (Readings 70-180 mg/dL / Total readings) x 100
TBR (%) = (Readings <70 mg/dL / Total) x 100  |  TAR (%) = (Readings >180 mg/dL / Total) x 100

ATTD Consensus Targets (2019): The Advanced Technologies & Treatments for Diabetes consensus statement established international TIR targets for people with type 1 and type 2 diabetes:

TIR >70%  *  TBR <4% (very low <1%)  *  TAR <25% (very high <5%)

Why TIR matters more than HbA1c alone: A1c reflects an average - two people can have the same A1c with completely different glucose profiles. One may spend 90% of their time in range; another may oscillate between hypos and hyperglycaemia. TIR captures variability that A1c cannot.

A 5% improvement in TIR (roughly 1.2 more hours per day in range) is associated with clinically meaningful reductions in complications risk, per the ATTD consensus.

! Medical Disclaimer
This calculator is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider or a qualified diabetes educator regarding your personal health and any changes to your management plan. Individual results may vary.