HbA1c converter
Convert an HbA1c result between percent and mmol/mol, with the average glucose it stands for.
That is at or above the diabetes threshold of 6.5%. That corresponds to an average glucose of about 139.8 mg/dL (7.763 mmol/L).
What it means
Where does that sit?
Information only, not medical advice. Diagnostic thresholds are the ADA and WHO values; targets for treatment are set individually with a doctor.
Every unit
Your HbA1c in every unit
Learn
Three things worth knowing
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48 mmol/mol = 6.5%
The diabetes threshold is 6.5% or 48 mmol/mol, prediabetes starts at 5.7% (39 mmol/mol), and 7% (53 mmol/mol) is a common treatment target.
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Two scales, one blood test
The percent scale came from the DCCT trial in the 1990s; the IFCC reference method measures more precisely and gives mmol/mol. Labs switched in 2011 in much of the world, which is why old and new results look so different.
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It is not a glucose reading
An HbA1c of 7% does not mean a blood sugar of 7. It corresponds to an average of about 154 mg/dL or 8.6 mmol/L. Anemia and some hemoglobin variants can make the test read wrong.
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Popular HbA1c conversions
Background
About HbA1c
HbA1c measures how much of your hemoglobin has sugar stuck to it. Red blood cells live about three months, so it shows your average blood sugar over that time rather than on the day of the test.
The US reports it as a percent; the UK, Europe and much of the world use mmol/mol. The two are linked by a fixed equation, and both translate into an estimated average glucose.