1. What is HbA1c to mmol/L Conversion?

This calculator converts HbA1c values from mmol/mol (IFCC units) to estimated average glucose in mmol/L, considering blood volume. This helps translate long-term glucose control measurements into more familiar daily glucose units.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• \( mmol/mol \) — HbA1c value in IFCC units
• 10.93, 2.15, 28.7, 46.7 — Conversion coefficients
• 18.015 — Molecular weight of glucose (g/mol)

Explanation: The formula accounts for the relationship between glycated hemoglobin and average blood glucose levels over approximately 3 months.

3. Importance of HbA1c Conversion

Details: Converting HbA1c to estimated average glucose helps patients and clinicians better understand diabetes control in terms of daily glucose measurements.

4. Using the Calculator

Tips: Enter HbA1c value in mmol/mol (IFCC units). Typical values range from 20-120 mmol/mol (approximately 4-12% in DCCT units).

5. Frequently Asked Questions (FAQ)

Q1: Why convert HbA1c to mmol/L?
A: It helps patients relate their long-term glucose control to their daily fingerstick glucose measurements.

Q2: How accurate is this conversion?
A: It provides an estimate; individual variations in red blood cell turnover can affect accuracy.

Q3: What's the difference between mmol/mol and % units?
A: mmol/mol (IFCC) is the newer international standard, while % (DCCT) is the older unit (1% ≈ 10.93 mmol/mol).

Q4: Does this account for blood volume changes?
A: Yes, the formula includes coefficients that account for typical blood volume considerations.

Q5: Can I use this for diagnosis?
A: No, this is for monitoring only. Diagnosis should be based on standardized HbA1c measurements.