A1C (glycated hemoglobin) reflects the average blood glucose levels over approximately 3 months. It's measured as a percentage of hemoglobin that is coated with sugar.

How to convert A1C to average glucose (eAG)?

eAG (mg/dL) = 28.7 × A1C(%) − 46.7. For example, an A1C of 7% equals approximately 154 mg/dL average glucose.

What are normal A1C ranges?

Normal: <5.7% | Prediabetes: 5.7-6.4% | Diabetes: ≥6.5%. These are ADA guidelines. Consult your healthcare provider for personalized targets.

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Bulk A1C Converter

Q: What are normal A1C ranges?

Normal: <5.7% | Prediabetes: 5.7-6.4% | Diabetes: ≥6.5%. These are ADA guidelines. Consult your healthcare provider for personalized targets.

Convert multiple A1C values at once by uploading a CSV file

Upload CSV File

Upload a CSV file with 'mode' and 'value' columns for batch conversion

Valid Input Modes:

• a1c_pct - A1C percentage (3-20%)
• eag_mgdl - eAG in mg/dL (50-450)
• eag_mmoll - eAG in mmol/L (2.8-25)
• a1c_mmolmol - A1C in mmol/mol (15-200)

How to use:

Download the CSV template to see the required format
Fill in your data with the appropriate mode and value for each row
Upload your CSV file to process all conversions at once
Download the results with all calculated values

Supported Input Formats

The CSV file must contain two columns: mode and value. The mode determines how to interpret the value:

a1c_pct: A1C percentage (e.g., 6.5 for 6.5%)
eag_mgdl: Estimated average glucose in mg/dL
eag_mmoll: Estimated average glucose in mmol/L
a1c_mmolmol: A1C in IFCC units (mmol/mol)

Output Format

The results CSV will include all original columns plus:

A1C percentage
A1C in mmol/mol (IFCC)
eAG in mg/dL
eAG in mmol/L
ADA classification (normal, prediabetes, or meets diabetes threshold)

Use Cases

Clinical research data processing
Laboratory result batch conversion
Electronic health record data migration
Population health studies
Quality assurance and reporting

Data Privacy

All processing happens locally in your browser. No data is sent to any server. Your CSV files and results remain completely private and are not stored anywhere.