Does the Sensor need to be calibrated?

No fingerstick calibration is required. Unlike other sensor-based glucose monitoring systems that are currently available, the FreeStyle Libre Sensor is factory calibrated1. Once activated, the Sensor starts recording glucose readings automatically after the 1-hour warm-up period2.


1. Alva S, Bailey T, Brazg R, et al. Accuracy of a 14-day factory-calibrated continuous glucose monitoring system with advanced algorithm in pediatric and adult population with diabetes. Journal of Diabetes Science and Technology 2022;16(1):70-77.

2. FreeStyle Libre flash glucose monitoring system User's Manual.

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