🩸 Blood Glucose Unit Converter

Instantly convert blood glucose readings between mg/dL and mmol/L in either direction. Different countries use different units (US/Korea use mg/dL, Europe/Canada/UK/Australia use mmol/L), so this is useful when reading lab results or literature from abroad. An HbA1c-to-eAG reference table is also included.

⚠️ Medical Disclaimer

This tool is an educational and reference unit converter only and cannot replace medical diagnosis or treatment decisions. Always consult your medical team for actual blood sugar management or insulin dose adjustments.

HbA1c (%)

eAG (mg/dL)

154

eAG (mmol/L)

8.6

HbA1c ↔ eAG (Estimated Average Glucose) Reference Table

HbA1c (%)	eAG (mg/dL)	eAG (mmol/L)
5.0	97	5.4
5.5	111	6.2
6.0	126	7.0
6.5	140	7.8
7.0	154	8.6
7.5	169	9.4
8.0	183	10.2
9.0	212	11.8
10.0	240	13.4
12.0	298	16.5

GUIDE

Learn more

Why Are There Two Units for Blood Glucose?

Blood glucose is reported in two units worldwide. The US, Korea, and Japan mainly use mg/dL (milligrams per deciliter), while the UK, Europe, Canada, and Australia mainly use mmol/L (millimoles per liter). The two units convert into each other using the molar mass of glucose (approximately 18.016 g/mol).

Conversion Formula

mmol/L = mg/dL ÷ 18.016
mg/dL = mmol/L × 18.016

Example: 100 mg/dL ÷ 18.016 = 5.55 mmol/L

What Are HbA1c and eAG?

HbA1c (glycated hemoglobin) reflects average blood sugar levels over the past 2-3 months. eAG (estimated Average Glucose) converts the HbA1c value into the everyday blood glucose units (mg/dL or mmol/L) to help make it easier to understand.

eAG Formula (ADAG Study)

eAG(mg/dL) = 28.7 × HbA1c(%) − 46.7
eAG(mmol/L) = 1.5944 × HbA1c(%) − 2.5944

This formula was derived from the 2008 international ADAG (A1C-Derived Average Glucose) study.

HbA1c ↔ eAG Reference Table

HbA1c (%)	eAG (mg/dL)	eAG (mmol/L)
5.0	97	5.4
5.5	111	6.2
6.0	126	7.0
6.5	140	7.8
7.0	154	8.6
7.5	169	9.4
8.0	183	10.2
9.0	212	11.8
10.0	240	13.4
12.0	298	16.5

Reference Blood Glucose Targets

Commonly cited general adult diabetes targets are 80-130 mg/dL (4.4-7.2 mmol/L) fasting and below 180 mg/dL (10.0 mmol/L) 2 hours after a meal. However, target ranges vary by individual health status, age, and comorbidities - always follow the targets set by your medical team.

Frequently asked questions

Why divide by 18.016 and not 18?

Glucose has a molar mass of approximately 180.16 g/mol, and 18.016 comes from dividing this by 10 to convert between deciliters (dL) and millimoles (mmol). It is often rounded to 18 for everyday use, but 18.016 is used for precise calculations.

Which is more accurate, HbA1c or eAG?

They express the same information in different ways. HbA1c is measured directly in a lab, while eAG converts it into everyday glucose units as an estimate. Since eAG is only an average estimate, it does not reflect actual blood sugar swings (high/low spikes).

Can I get a diabetes diagnosis from this converter's result?

No. This tool is for unit conversion reference only - diagnosing and planning treatment for diabetes must always be done through testing and judgment by a medical professional.