Blood Sugar Unit Converter

Result
5.55 mmol/L
Input
100 mg/dL

Blood sugar reference ranges

Categorymg/dLmmol/L
Normal (fasting)70–993.9–5.5
Pre-diabetic (fasting)100–1255.6–6.9
Diabetic (fasting)126+7.0+
Normal (2hr after meal)<140<7.8
Diabetic (2hr after meal)200+11.1+

About the Blood Sugar Converter

Blood glucose appears as milligrams per deciliter in the United States and many Latin American countries, while Europe, Canada, Australia, and much of Asia report millimoles per liter. The conversion factor is approximately eighteen for quick mental math: divide mg/dL by eighteen to get mmol/L, or multiply mmol/L by eighteen for mg/dL. A fasting value of ninety mg/dL corresponds to five mmol/L, a anchor point diabetics traveling abroad memorize quickly.

Continuous glucose monitors and lab printouts mix units when apps sync devices purchased in different regions. Misreading a Canadian mmol/L result as if it were mg/dL creates dangerous underestimation of hyperglycemia. Healthcare travelers should confirm unit labels on every report before adjusting insulin or oral medications with their care team.

Research papers and international guidelines such as ADA and WHO targets publish thresholds in both units, but consumer education materials often assume local convention only. HbA1c remains a separate percentage measure of long-term exposure, not convertible through the same factor as fingerstick glucose. Ketone and cholesterol units suffer similar regional splits, compounding confusion for expatriates managing chronic conditions.

Wearable integrations and telehealth platforms increasingly localize displays, yet raw data exports for personal spreadsheets may still arrive in the non-preferred unit. Logging consistently in one unit while converting at import time prevents trend analysis errors that could mask gradual drift out of range.

Use this converter when interpreting foreign lab results, configuring diabetes apps after relocation, or helping family members understand dual-unit documentation from multinational clinical trials. Always confirm treatment decisions with qualified medical professionals rather than relying on conversion alone.

Specialized tools

Frequently asked questions

Divide mg/dL by 18.018 or use 18 for a close approximation. Example: 126 mg/dL ÷ 18 ≈ 7.0 mmol/L.

Roughly 70–99 mg/dL or 3.9–5.5 mmol/L for many adults without diabetes. Targets vary individually; follow your clinician's guidance.

CGMs display in regional default units but measure interstitial glucose correlated to blood values. Confirm unit settings in the app after device setup.