HbA1c: % to mmol/mol converter
Convert hba1c between % and mmol/mol instantly - type a value in either box. With the exact formula, a reference table and what it means for your result.
Formula: mmol/mol = % × 10.929 − 23.5
Reverse: % = (mmol/mol + 23.5) ÷ 10.929
Conversion factor source: Labcorp, SI Unit Conversion Table
Common values
| % | mmol/mol |
|---|---|
| 5 | 31 |
| 5.7 | 39 |
| 6 | 42 |
| 6.5 | 48 |
| 7 | 53 |
| 8 | 64 |
Frequently asked questions
What is the formula to convert hba1c?
mmol/mol = % × 10.929 − 23.5. To go the other way, divide instead of multiply.
How do I convert mmol/mol to %?
% = (mmol/mol + 23.5) ÷ 10.929. It is the same conversion in reverse - type a value in the mmol/mol field above and the % value appears instantly.
Which unit does my country use for hba1c?
The US typically reports %; most of Europe, Russia and Israel use mmol/mol. Your lab prints its unit next to the value.
Does converting change what my result means?
No - it's the same value in a different unit. Always compare it to your own lab's reference range and discuss with your doctor.
Reading a full lab report? See the HbA1c marker guide or upload your report - Mediora explains every value.
Upload a test - freeConversion is provided for convenience - always read your result against your own lab's units and reference range, with your doctor.