🩸 Blood Sugar Converter
Convert between mg/dL and mmol/L
⚠️ This converter is for educational purposes. Always consult your healthcare provider for medical advice.
Milligrams per deciliter
Blood Sugar Ranges (Fasting)
Other Testing Times
After Meals (2 hours)
Random (Any Time)
*Plus symptoms: excessive thirst, frequent urination, blurred vision
Formula
mg/dL to mmol/L
Example: 100 mg/dL ÷ 18.0182 = 5.55 mmol/L
mmol/L to mg/dL
Example: 5.0 mmol/L × 18.0182 = 90 mg/dL
HbA1c (Average Blood Sugar)
HbA1c measures average blood sugar over 2-3 months. It's used to diagnose and monitor diabetes.
Managing Blood Sugar
🥗 Lower Blood Sugar
- • Reduce refined carbs and sugar
- • Exercise regularly (30 min/day)
- • Increase fiber intake
- • Stay hydrated
- • Manage stress
- • Get adequate sleep
⚠️ Raise Blood Sugar (if low)
- • 15g fast-acting carbs (juice, glucose tabs)
- • Wait 15 minutes, recheck
- • Repeat if still below 70 mg/dL
- • Eat a meal/snack once normal
- • Call doctor if severe symptoms
How to Use This Calculator
Choose your starting unit
Select whether you want to enter your reading in mg/dL or mmol/L. The highlighted button shows the active unit.
Enter your blood sugar value
Type the numerical value from your glucose meter. The placeholder suggests a typical result for the selected unit.
Press “Convert Blood Sugar”
Review the converted value, fasting range classification, and helpful guidance. Consult your clinician for interpretation.
Full Description
The Blood Sugar Converter streamlines the process of switching between mg/dL and mmol/L readings. Many glucose meters, lab reports, and international guidelines use different units; having both values immediately available makes it easier to compare targets, share data with your care team, and interpret research findings.
Beyond the unit conversion, the tool contextualizes your fasting glucose level by highlighting clinically recognised categories: hypoglycemia, normal, prediabetes, diabetes, and dangerously high levels. These ranges are based on standards from the American Diabetes Association and similar professional bodies.
Use the additional tables to check post-meal and random glucose goals, understand how HbA1c relates to average glucose, and explore lifestyle strategies that support stable blood sugar levels. Always discuss persistent highs or lows with a licensed healthcare professional.
Frequently Asked Questions
What is the difference between mg/dL and mmol/L?
Both units express glucose concentration. mg/dL (milligrams per deciliter) is common in the United States and a few other countries, whereas mmol/L (millimoles per liter) is standard in Canada, Europe, Australia, and most of the world. The calculator uses the international conversion factor of 18.0182.
When should I test my blood sugar?
Typical checkpoints include fasting (before breakfast), before meals, two hours after meals, at bedtime, and whenever you feel symptoms of high or low glucose. Follow the schedule recommended by your healthcare provider.
What causes high blood sugar?
Elevated readings can stem from insulin deficiency or resistance, large carbohydrate intake, illness, stress, certain medications, or lack of physical activity. Chronic hyperglycemia requires medical evaluation.
How can I treat low blood sugar quickly?
Consume 15 grams of fast-acting carbohydrate such as glucose tablets, fruit juice, or regular soda. Recheck in 15 minutes and repeat if still below 70 mg/dL (3.9 mmol/L). Seek emergency care if symptoms persist or worsen.
Does this replace medical advice?
No. The converter provides educational information only. Always work with your doctor or diabetes educator for diagnosis, medication adjustments, and personalised treatment plans.