FreeStyle Libre sensor end date calculator

How long a FreeStyle Libre sensor lasts

Sensor	Wear time
FreeStyle Libre 2	14 days
FreeStyle Libre 3	14 days
FreeStyle Libre 2 Plus	15 days
FreeStyle Libre 3 Plus	15 days

The sensor ends at the same time of day you started it: a Libre 3 started on a Monday at 8:00 ends two weeks later, on the Monday at 8:00. The calculator above uses your phone's time zone.

The first hour: warm-up

Every sensor needs 60 minutes to warm up before it gives readings. During that hour LibreLinkUp can keep showing the last value of your previous sensor, which looks live but isn't. Dulce detects the warm-up and shows a countdown on the Lock Screen and in widgets instead of a stale number; the Lock Screen guide shows where.

When readings stop early

A sensor can stop before its end date: it came loose, got knocked, or the Libre app reports a sensor error. If readings stop but the sensor isn't due yet, first check that new readings reach LibreLinkUp at all with the LibreLinkUp troubleshooting guide, then follow Abbott's instructions for a replacement.

See days left in Dulce

Dulce shows how many days your current sensor has left on the home screen, so you don't need to count.

Source

• Abbott. FreeStyle Libre CGM systems comparison guide. freestyleprovider.abbott

This article is for information and does not replace advice from your care team. Dulce is not a medical device and does not replace your sensor's alarms.