what is blood sugar level measured in

Blood sugar levels are typically measured in milligrams per deciliter (mg/dL) in the United States. In many other countries, blood sugar levels are measured in millimoles per liter (mmol/L).

Here’s a quick reference table for blood sugar level measurements:

Measurement Unit Normal Range (Fasting) Prediabetes Range Diabetes Range

mg/dL 70–99 100–125 126 or higher
mmol/L 3.9–5.5 5.6–6.9 7.0 or higher

Blood sugar levels can be measured using a glucose meter for at-home testing or through laboratory tests like the A1C test, which provides an average blood sugar level over the past 2–3 months.