HbA1c Converter

Convert HbA1c values between percentage (%) and mmol/mol units instantly with this free online medical calculator.

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About This Tool

This HbA1c converter tool provides accurate conversion between the two standard units used for measuring hemoglobin A1c levels: percentage (%) and mmol/mol. HbA1c is a critical biomarker for diabetes management, and this tool helps healthcare professionals, patients, and researchers easily convert between units for accurate interpretation of test results. The converter uses the standard IFCC-NGSP formula for precise conversions.

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How to Use

Enter your HbA1c value in the input field
Select the unit of your input value (either % or mmol/mol)
Choose which conversion you want to perform (to the other unit)
Click the 'Convert HbA1c' button to see the result
View the converted value along with clinical interpretation

Frequently Asked Questions

Find Quick Answers

What is HbA1c and why is it important?

HbA1c (hemoglobin A1c) is a form of hemoglobin that is chemically linked to glucose. It reflects average blood glucose levels over the past 2-3 months and is a key indicator for diabetes diagnosis and management.

What are the two main units for HbA1c measurement?

HbA1c is measured in two units: percentage (%) used in the NGSP system, and mmol/mol used in the IFCC system. Most countries now report both units on lab results.

How accurate is this HbA1c converter?

This converter uses the standard IFCC-NGSP master equation: HbA1c (mmol/mol) = (HbA1c (%) - 2.15) × 10.929, which is the internationally recognized formula for conversion between these units.

Can I use this tool for medical decisions?

This tool provides accurate conversions based on standard formulas, but always consult with a healthcare professional for medical diagnosis and treatment decisions. The tool is for informational purposes only.

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