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How accurate is my FreeStyle Libre 2 Plus sensor?

Both the FreeStyle Libre 2 and FreeStyle Libre 2 Plus sensors are accurate and meet and exceed the FDA’s highest accuracy standards1-2.

In a clinical trial, the FreeStyle Libre 2 Plus sensor demonstrated extended accuracy out to 15 days, and a lower overall MARD of 8.2%3.

1 FDA Decision Summary (K222447). https://www.accessdata.fda.gov/cdrh_docs/reviews/K222447.pdf 

2 Based on FDA iCGM special controls. Accessed May 2026 from: https://www.ecfr.gov/current/title-21/chapter-I/subchapter-H/part-862/subpart-B/section-862.1355.

3 FreeStyle Libre 2 User’s Manual


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