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HbA1c Unit Converter (% ↔ mmol/mol)

Convert HbA1c between NGSP percent and IFCC mmol/mol.

For everyoneUnit convertersv1.0.1

Your measurements

Calculated on your device. Nothing is sent to a server.

Your result will appear here

Enter your measurements, then press Calculate.

Methodology

IFCC–NGSP master equation

IFCC (mmol/mol) = (NGSP % − 2.152) ÷ 0.09148 (NGSP = 0.09148 × IFCC + 2.152)

The master equation links the IFCC reference method with the NGSP (DCCT-aligned) percentage.

Who it is for
Any result reported in these units.
Version
1.0.1

Limitations

  • Check which unit your laboratory uses before converting.

References

  1. Hoelzel W, Weykamp C, Jeppsson JO, et al. IFCC reference system for measurement of hemoglobin A1c in human blood and the national standardization schemes in the United States, Japan, and Sweden: a method-comparison study. Clin Chem. 2004;50(1):166–174. doi:10.1373/clinchem.2003.024802

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