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Blood Glucose Unit Converter

Q: Why do different countries use mg/dL vs mmol/L?

The United States, Germany, France, Italy, Poland, and Spain traditionally measure glucose as mass per volume (mg/dL). The United Kingdom, Canada, Australia, Sweden, and the Netherlands follow the International System of Units (SI) measuring molar concentration (mmol/L).

Q: What is the exact conversion formula for blood glucose?

To convert mg/dL to mmol/L, divide by 18.0182 (or roughly 18). To convert mmol/L to mg/dL, multiply by 18.0182.

Q: What is a normal blood sugar level 2 hours after eating?

In non-diabetic adults, normal blood sugar 2 hours after a meal is under 140 mg/dL (7.8 mmol/L). For diabetic individuals, the general ADA target is under 180 mg/dL (10.0 mmol/L).

Q: What is the clinical cutoff for hypoglycemia?

A blood glucose level below 70 mg/dL (3.9 mmol/L) is universally recognized as clinical hypoglycemia and requires prompt intervention.

Instantly convert blood sugar readings between mg/dL and mmol/L with live two-way synchronization and clinical category indicators.

Milligrams per Deciliter (mg/dL)

mg/dL

Used in US, France, Germany, Italy, Poland, Spain, Japan, etc.

Millimoles per Liter (mmol/L)

mmol/L

Used in UK, Canada, Australia, Sweden, Netherlands, China, etc.

Quick Clinical Presets:

Normal Fasting Range

Blood Glucose Unit Converter (mg/dL ↔ mmol/L) Online | Overspire

Blood Glucose Reference Comparison Chart

Reference table detailing international blood glucose values and clinical thresholds across fasting and 2-hour postprandial states.

Clinical State	mg/dL	mmol/L	Clinical Classification
Hypoglycemia Threshold	< 70 mg/dL	< 3.9 mmol/L	Low Blood Sugar (Hypoglycemia)
Fasting (Normal)	70 – 99 mg/dL	3.9 – 5.5 mmol/L	Normal Fasting Range
Fasting (Prediabetes / IFG)	100 – 125 mg/dL	5.6 – 6.9 mmol/L	Impaired Fasting Glucose (Prediabetes)
Fasting (Diabetes Threshold)	≥ 126 mg/dL	≥ 7.0 mmol/L	Elevated (Diabetes Range)
2 Hours Post-Meal (Normal)	< 140 mg/dL	< 7.8 mmol/L	Normal Fasting Range
2 Hours Post-Meal (Impaired)	140 – 199 mg/dL	7.8 – 11.0 mmol/L	Impaired Fasting Glucose (Prediabetes)
2 Hours Post-Meal (Diabetes)	≥ 200 mg/dL	≥ 11.1 mmol/L	Marked Hyperglycemia

How to Convert mg/dL and mmol/L?

The exact molecular conversion factor between mass concentration (mg/dL) and molar concentration (mmol/L) of D-glucose (molar mass 180.16 g/mol) is 18.0182:

mmol/L = mg/dL ÷ 18.0182

mg/dL = mmol/L × 18.0182

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Frequently Asked Questions (FAQ)

Why do different countries use mg/dL vs mmol/L?

The United States, Germany, France, Italy, Poland, and Spain traditionally measure glucose as mass per volume (mg/dL). The United Kingdom, Canada, Australia, Sweden, and the Netherlands follow the International System of Units (SI) measuring molar concentration (mmol/L).

What is the exact conversion formula for blood glucose?

To convert mg/dL to mmol/L, divide by 18.0182 (or roughly 18). To convert mmol/L to mg/dL, multiply by 18.0182.

What is a normal blood sugar level 2 hours after eating?

In non-diabetic adults, normal blood sugar 2 hours after a meal is under 140 mg/dL (7.8 mmol/L). For diabetic individuals, the general ADA target is under 180 mg/dL (10.0 mmol/L).

What is the clinical cutoff for hypoglycemia?

A blood glucose level below 70 mg/dL (3.9 mmol/L) is universally recognized as clinical hypoglycemia and requires prompt intervention.

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Medical Disclaimer: This converter is intended strictly for educational and informational purposes and does not replace medical advice, diagnosis, or treatment. Always consult your physician.