A method for calibrating an analyte sensor (100A, 100B), the method comprising: receiving sensor data from an analyte sensor, the sensor data comprising a plurality of sensor data points; receiving reference data from a reference analyte monitor, the reference data comprising a reference analyte value; matching a first sensor data point with the reference analyte value to form a first matchec data pair, wherein matching the first sensor data point with the reference analyte value to form the first matched data pair is performed, without compensating for a time lag between the reference analyte value and the first sensor data point, such that a time stamp for the reference analyte value is as close as possible to a time stamp of the first sensor data point; and converting sensor data into an estimated analyte value, utilizing the first matched data pair; characterised in that the method further comprises: displaying the estimated analyte value within about 10 minutes of receiving the reference analyte value and subsequently matching the reference analyte value with a second sensor data point to form a second matched data pair, wherein the second sensor data point is different from the first sensor data point; and converting additional sensor data into an additional estimated analyte value utilizing the second matched data pair and displaying the additional estimated analyte value. receiving sensor data from an analyte sensor, the sensor data comprising a plurality of sensor data points; receiving reference data from a reference analyte monitor, the reference data comprising a reference analyte value; matching a first sensor data point with the reference analyte value to form a first matchec data pair, wherein matching the first sensor data point with the reference analyte value to form the first matched data pair is performed, without compensating for a time lag between the reference analyte value and the first sensor data point, such that a time stamp for the reference analyte value is as close as possible to a time stamp of the first sensor data point; and converting sensor data into an estimated analyte value, utilizing the first matched data pair; characterised in that the method further comprises: displaying the estimated analyte value within about 10 minutes of receiving the reference analyte value and subsequently matching the reference analyte value with a second sensor data point to form a second matched data pair, wherein the second sensor data point is different from the first sensor data point; and converting additional sensor data into an additional estimated analyte value utilizing the second matched data pair and displaying the additional estimated analyte value. displaying the estimated analyte value within about 10 minutes of receiving the reference analyte value and subsequently matching the reference analyte value with a second sensor data point to form a second matched data pair, wherein the second sensor data point is different from the first sensor data point; and converting additional sensor data into an additional estimated analyte value utilizing the second matched data pair and displaying the additional estimated analyte value.