HbA1c: units, conversion and tracking
Updated
Short answer
HbA1c is reported in % and mmol/mol. mmol/mol = (% − 2.15) × 10.929 (IFCC master equation).
Convert HbA1c
Enter a value to see the converted result.
Converts units only and does not interpret a result. For other markers, use the full unit converter.
What is HbA1c?
The share of haemoglobin that has glucose attached, reflecting average blood glucose over roughly two to three months.
BiomarkerHQ groups HbA1c under Metabolic. On lab reports it can also appear as hemoglobin a1c, haemoglobin a1c, glycated hemoglobin, glycated haemoglobin, glycohemoglobin and glycosylated hemoglobin.
HbA1c units and conversion
BiomarkerHQ stores each HbA1c result in the unit printed on the report, and charts and compares results in %.
mmol/mol = (% − 2.15) × 10.929 (IFCC master equation)
| mmol/mol | % |
|---|---|
| 20 mmol/mol | 3.98 % |
| 30 mmol/mol | 4.895 % |
| 40 mmol/mol | 5.81 % |
| 50 mmol/mol | 6.725 % |
| 60 mmol/mol | 7.64 % |
| 70 mmol/mol | 8.555 % |
| 80 mmol/mol | 9.47 % |
| % | mmol/mol |
|---|---|
| 4 % | 20.22 mmol/mol |
| 5 % | 31.15 mmol/mol |
| 6 % | 42.08 mmol/mol |
| 7 % | 53.01 mmol/mol |
| 8 % | 63.93 mmol/mol |
| 9 % | 74.86 mmol/mol |
| 10 % | 85.79 mmol/mol |
For another value, use the lab unit converter. It converts units only and does not interpret a result.
Tracking HbA1c over time
In BiomarkerHQ, each HbA1c result is saved with its collection date, its unit and the reference range printed on that report. The timeline charts the results across your draws against the range from each of your own reports, and any two draws can be compared side by side.
- Keep the unit printed on each report. Convert only to compare.
- Keep each report's own range with its result. See why ranges differ between labs.
- Compare the same lab and conditions where you can. See how to compare two blood tests.
Frequently asked questions
Which units do labs report HbA1c in?
HbA1c is reported in % and mmol/mol. BiomarkerHQ stores each result in the unit printed on the report and uses % for charts and comparisons.
How do I convert HbA1c from mmol/mol to %?
mmol/mol = (% − 2.15) × 10.929 (IFCC master equation). For example, 50 mmol/mol is 6.725 %.
How do I convert HbA1c from % to mmol/mol?
mmol/mol = (% − 2.15) × 10.929 (IFCC master equation). For example, 7 % is 53.01 mmol/mol.
Does BiomarkerHQ interpret my HbA1c result?
No. It compares a result only with the reference range printed on your own lab report, as below, within or above, and does not say what the result means. Talk to a qualified clinician about your results.
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