HNA1C Calculator

Convert average blood glucose levels to HbA1c percentage with detailed health interpretation.

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About This Tool

This HbA1c calculator allows you to convert your average blood glucose levels (in either mg/dL or mmol/L) to the corresponding HbA1c percentage, which is a key indicator of long-term blood sugar control. The tool provides detailed interpretation of your results according to standard medical guidelines, helping you understand what your HbA1c level means for your health. It's a valuable tool for diabetes management and monitoring.

Save your calculation history with a free account

How to Use

Enter your average blood glucose level in the input field
Select your preferred unit (mg/dL or mmol/L)
Click the 'Calculate HbA1c' button
View your calculated HbA1c percentage and detailed interpretation
Use the 'Reset' button to clear all fields and start over

Frequently Asked Questions

Find Quick Answers

What is HbA1c?

HbA1c (hemoglobin A1c) is a blood test that measures your average blood sugar levels over the past 2-3 months. It shows what percentage of your hemoglobin is coated with sugar.

How accurate is this calculator?

This calculator uses the standard ADA (American Diabetes Association) formula: HbA1c = (46.7 + average glucose in mg/dL) / 28.7. While it provides a good estimate, it's not a substitute for actual laboratory testing.

What is a normal HbA1c level?

For people without diabetes, a normal HbA1c level is below 5.7%. Levels between 5.7% and 6.4% indicate prediabetes, and 6.5% or higher indicates diabetes.

Can I use this calculator with mmol/L values?

Yes, the calculator automatically converts mmol/L to mg/dL internally using the standard conversion factor (1 mmol/L = 18 mg/dL) before calculating the HbA1c percentage.

Need to run multiple calculations?

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