If you searched for a mmol/mol to mg/dL calculator, you are usually trying to translate HbA1c values (reported in mmol/mol) into estimated average glucose (reported in mg/dL). This tool does exactly that, and also lets you convert in reverse.
HbA1c mmol/mol ↔ mg/dL Calculator
Convert between HbA1c in mmol/mol (IFCC units) and estimated average glucose in mg/dL.
How this conversion works
There is no direct chemistry conversion from mmol/mol to mg/dL in the way you might convert grams to kilograms. Instead, the calculator uses the accepted clinical relationship between:
- HbA1c (long-term glucose marker, usually in mmol/mol outside the U.S.)
- Estimated average glucose (eAG) in mg/dL (common U.S. glucose unit)
Formulas used
1) Convert HbA1c from mmol/mol to % (NGSP):
HbA1c(%) = (mmol/mol ÷ 10.929) + 2.152
2) Convert HbA1c(%) to eAG in mg/dL:
eAG(mg/dL) = (28.7 × HbA1c%) − 46.7
Reverse:
HbA1c(%) = (mg/dL + 46.7) ÷ 28.7, then
mmol/mol = 10.929 × (HbA1c% − 2.152)
Quick reference table
| HbA1c (mmol/mol) | HbA1c (%) | Estimated Avg Glucose (mg/dL) |
|---|---|---|
| 31 | 5.0% | 97 |
| 42 | 6.0% | 126 |
| 48 | 6.5% | 140 |
| 53 | 7.0% | 154 |
| 64 | 8.0% | 183 |
| 75 | 9.0% | 212 |
| 86 | 10.0% | 240 |
Example calculations
Example 1: 53 mmol/mol to mg/dL
53 mmol/mol corresponds to roughly 7.0% HbA1c, which gives an estimated average glucose of about 154 mg/dL.
Example 2: 180 mg/dL to mmol/mol
180 mg/dL corresponds to about 7.9% HbA1c, which is approximately 63 mmol/mol.
Important notes
- This calculator gives an estimate based on established formulas.
- Lab methods and individual biology can create variation between measured glucose and calculated eAG.
- Use results for education and tracking; discuss treatment decisions with your clinician.
FAQ
Is mmol/mol the same as mmol/L?
No. mmol/mol is used for HbA1c reporting, while mmol/L is used for blood glucose concentration. They are not interchangeable units.
Can I convert mmol/L glucose to mg/dL directly?
Yes, for glucose concentration: mg/dL = mmol/L × 18. But that is a different conversion than HbA1c mmol/mol to mg/dL eAG.
Why do some countries show HbA1c in %?
Different regions follow different reporting standards. Many countries use IFCC units (mmol/mol), while others still show NGSP/DCCT percentage values.