Calculator · Diabetes / endocrine

HbA1c converter (IFCC DCCT)

Convert HbA1c mmol/mol % and estimate average glucose.

What it is for

Interpreting old/new units and explaining "average glucose" to patients.

Use the working calculator

The working HbA1c converter (IFCC DCCT) calculator is on our calculators page. It is free and needs no account. Enter the values and it shows the result with the reading that goes with it.

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What you enter

The calculator asks for one item.

  • HbA1c (IFCC) (mmol/mol)

How the result is read

The result is shown as HbA1c. Formula: DCCT% = (IFCC ÷ 10.929) + 2.15 · eAG (mmol/L) = 1.59 × % − 2.59.

The calculator reports one of these readings, with the action that goes with it: Normal / non-diabetic; Pre-diabetes (high risk); Diabetes range; Above target.

Sources

These are the sources the calculator cites. Check the current version before relying on a threshold.

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For qualified clinicians. A score supports a clinical decision and does not make it: check the inputs, read the cited source, and use the tools in your clinical system for patient care where one is provided.