A1C Calculator : Hemoglobin A1C to Blood Glucose Converter

Our A1C Calculator converts between A1C and blood glucose levels. A1C shows average blood sugar over 2-3 months. Levels: below 5.7% normal, 5.7-6.4% prediabetes, above 6.5% diabetes. Use our calculator to convert between HbA1c and estimated average glucose (eAG) values.

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A1C Conversion Chart and Calculator

Your A1C test result (also known as HbA1c or glycated hemoglobin) can be a good gauge of your diabetes control because it provides an estimated average blood glucose level over the past few months.

Unlike daily blood glucose test results, which are reported as mg/dL, A1C is often reported as a percentage, which can make it difficult to understand the relationship between the two values.

A1C (%)eAG (mg/dL)
4.068
5.097
5.5111
6.0126
6.5140
7.0154
7.5169
8.0183
8.5197
9.0212
9.5226
10.0240

Note: Use this information to become more familiar with the relationship between A1C and eAG values and help improve discussion of glucose control with your doctor. Never use it as a basis for changing your disease management on your own.

Trending Diabetes Topics

Explore popular questions about A1C, blood sugar management, and diabetes care.

A1C Level Reference Guide

Understanding different A1C ranges and their implications for diabetes management.

Normal Range (4.0% - 5.6%)

Normal A1C levels indicate good blood sugar control.

Prediabetes Range (5.7% - 6.4%)

Prediabetic range - lifestyle changes are recommended.