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Why you should look at
Time in Range

An important measurement that goes beyond HbA1c

What is HbA1c?

HbA1c is your average blood glucose (sugar) levels for the last two to three months.1

An HbA1c test is used to measure glucose levels by calculating how much haemoglobin in the blood has become glycated (chemically bonded with glucose).1

What is Time in Range?

Time in Range is the percentage of readings and time per day you spend within your target glucose range.

The FreeStyle Libre systems* automatically calculate the percentage of time you spend in, above, or below the target range agreed with your Healthcare Professional.2

This example Time in Range report shows a person who spent 75% of their day in target glucose range.

Images are for illustrative purposes only. Not real patent data.

What does this mean for you and your HbA1c?

Time in Range is a complementary measurement for you and your Healthcare Professional to use alongside  HbA1c3,4. And by increasing your Time in Range you'll see a decrease in your HbA1c.5

  • Every 10% increase in Time in Range can lower HbA1c by 0.8% for both Type 1 and Type 2 diabetes.5

  • Every 5% (~1 hour per day) increase in Time in Range has a positive impact on your glucose control.3

  • Spending more Time in Range can reduce risk long-term eye and kidney complications.6

Use FreeStyle Libre systems* to easily visualise your Time in Range to help you and your Healthcare Professional set clear goals.

Estimate of A1c for a given Time in Range level based on T1D and T2D studies.5

70% TARGET IS CHOSEN AS IT STRONGLY CORRELATES WITH A1C GOAL OF 7.0%3

Share your Time in Range data with your Healthcare Professional through LibreView₼

You and your Healthcare Professional can get in-depth information about your Time in Range through reports on LibreView₼, our secure^, cloud-based diabetes management system.

LibreLink app◊ and Libre 3 app◊◊ users need to create an account in LibreView for their data to automaticallyǁ upload. 

If you choose to share your LibreView data with your Healthcare Team, they will have access to all your glucose data to help them create a tailored treatment plan for you.

A snapshot of your AGP report in LibreView:

Further reading

Trend Arrows

⏱ 2 minutes read

Trend arrows allow you to see the direction your glucose is heading, allowing you to take corrective measures in advance.

Read article here

Triangle of Diabetes Care

⏱ 5 minutes read

Stay in control by tracking the three pillars of diabetes care with the FreeStyle Libre system.*

Read article here

References & Disclaimers

Images are for illustrative purposes only. Not real patient data.

* FreeStyle Libre systems refers to the FreeStyle Libre 2 and FreeStyle Libre 3 systems.

₼ The LibreView data management software is intended for use by both patients and healthcare professionals to assist people with diabetes and their healthcare professionals in the review, analysis and evaluation of historical glucose device data to support effective diabetes management. The LibreView software is not intended to provide treatment decisions or to be used as a substitute for professional healthcare advice.

◊ The FreeStyle LibreLink app is only compatible with certain mobile devices and operating systems. Please check the website for more information about device compatibility before using the app. Use of FreeStyle LibreLink may require registration with LibreView.

◊◊ The FreeStyle Libre 3 app is only compatible with certain mobile devices and operating systems. Please check our website for more information about device compatibility before using the app. Sharing of glucose data requires registration with LibreView.

ǁ The user's device must have internet connectivity for glucose data to automatically upload to LibreView.

^ LibreView is ISO27001/27018/27701 certified and HITRUST CSF Certified.

1. Diabetes UK, What is HbA1c? https://www.diabetes.org.uk/about-diabetes/looking-after-diabetes/hba1c (Last accessed: March 2026).

2. The international consensus sets the target in range (3.9-10 mmol/L) for adults with type 1 and type 2 diabetes who are not pregnant, not older, or at risk. Consult with a healthcare professional on individual target glucose range.

3. Battelino, T. Diabetes Care (2019): https://doi.org/10.2337/dci19-0028.

4. The international consensus report has been endorsed by the ADA, AACE, AADE, EASD, FEND, ISPAD, JDRF, and PES.

5. Vigersky RA, McMahon C. The relationship of hemoglobin A1c to time-in-range in patients with diabetes. Diabetes Technol Ther. (2019);21(2):81-85.

6. Beck, RW. Diabetes Care (2019): https://doi.org/10.2337/dc18-1444.

ADC-57252 v4.0

 

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