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Glycemic Synthesis

Blood Sugar

The definitive tool for glycemic documentation. Reconcile mg/dL and mmol/L with laboratory-grade precision and WHO classification.

Glucometric Auditor
WHO Classification
Normal (Fasting)
Estimated HbA1c
5.4%
Classification Guide
Hypoglycemia
below 70 mg/dL (< 3.9 mmol/L)
Normal (Fasting)
70–100 mg/dL (3.9–5.6 mmol/L)
Prediabetes
100–126 mg/dL (5.6–7 mmol/L)
Diabetes
126–200 mg/dL (7–11.1 mmol/L)
Dangerously High
above 200 mg/dL (> 11.1 mmol/L)

Frequently Asked Questions

What is blood sugar?

Blood sugar (blood glucose) is the concentration of glucose in the blood. It is the primary energy source for cells and is regulated by the pancreatic hormones insulin and glucagon.

What is the difference between mg/dL and mmol/L?

Both measure blood glucose concentration. mg/dL (milligrams per deciliter) is used in the US. mmol/L (millimoles per liter) is used in most other countries. 1 mmol/L = 18.01 mg/dL.

What is a normal fasting blood sugar?

A normal fasting blood glucose is below 100 mg/dL (5.6 mmol/L). Prediabetes is 100–125 mg/dL (5.6–6.9 mmol/L). Diabetes is diagnosed at 126 mg/dL (7.0 mmol/L) or higher.

What is the conversion factor between mg/dL and mmol/L?

The molecular weight of glucose is 180.16 g/mol. This gives the precise conversion factor: 1 mmol/L × 18.016 = 1 mg/dL.

What is HbA1c and how does it relate?

HbA1c measures the percentage of glycated hemoglobin, reflecting average blood sugar over 2–3 months. It is not measured in the same units as blood glucose but can be estimated: HbA1c (%) = (Average mg/dL + 46.7) / 28.7.