FAQ: How long does it take for my CGM to calibrate?
How long does it take for my CGM to calibrate?
Your sensor might take up to 48 hours to calibrate, and will typically become more accurate the longer you wear it. In the beginning, it’s better to pay attention to your glucose spikes and valleys instead of the absolute numbers. Accuracy can be improved with a finger stick calibration, but this isn't required - it’s also important to understand that finger stick readings will never exactly match the sensor reading.