
Living in Canada where blood glucose levels are measured in mmol/L makes it sometimes difficult when watching YouTube videos figuring out what they are talking about. In the US blood glucose is measured in mg/dl.
Whats the difference between mmol/L and mg/dL?
mmol/l stands for millimoles per litre.
A mole is a scientific unit often used to measure chemicals.
mg/dl stands for milligrams (mg) per deciliter (dL).
A milligram is one-thousandth of a gram.
A gram is about 1/30 of an ounce.
A decilitre measures fluid volume that is 1/10 liter.
Formulas to convert one to the other
- to calculate mmol/l from mg/dl: mmol/l = mg/dl / 18.
- to calculate mg/dl from mmol/l: mg/dl = 18 × mmol/l.
1 mg/dL = 0.0555 mmol/L
Blood Glucose Chart in mmol/L and mg/dl

What are normal blood glucose levels?
Normal | Less than 100 mg/dL ( 5.6 mmol/L) |
Prediabetes | 140 – 199 mg/dL (7.8 mmol/L – 11.0 mmol/L) |
Diabetes | 200 mg/dL (11.1 mmol/L) or higher two hours after a meal |
Fasting | Less than 100 |
Before meal | 70-130 |
1-2 hours after eating | Less than 180 |
Bedtime | 100-140 |
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