Blood Sugar Converter

For a healthy adult who has not eaten for at least 8 hours (fasting), a normal blood glucose level is 3.9-5.5 mmol/L (70-99 mg/dL). Two hours after a meal, normal levels are below 7.8 mmol/L (140 mg/dL). Fasting levels of 5.6-6.9 mmol/L (100-125 mg/dL) indicate prediabetes, and fasting levels at or above 7.0 mmol/L (126 mg/dL) on two separate tests indicate type 2 diabetes.

Both units measure blood glucose concentration. mg/dL (milligrams per deciliter) is used primarily in the United States. mmol/L (millimoles per litre) is used in the UK, Canada, Australia, and most of Europe. To convert from mg/dL to mmol/L, divide by 18.018. To convert from mmol/L to mg/dL, multiply by 18.018. For example, 126 mg/dL ÷ 18.018 ≈ 7.0 mmol/L.