Blood Sugar Calculator

Convert between different blood sugar measurement units and understand what your blood glucose levels mean for your health.

Understanding Blood Sugar Measurements

Blood sugar (glucose) levels can be measured in two different units:

• Millimoles per liter (mmol/L) - commonly used in the UK, Canada, and many other countries
• Milligrams per deciliter (mg/dL) - commonly used in the US and some other countries

Normal Blood Sugar Ranges

Fasting Blood Sugar (before meals)

• Normal: 70-99 mg/dL (3.9-5.5 mmol/L)
• Prediabetes: 100-125 mg/dL (5.6-6.9 mmol/L)
• Diabetes: 126 mg/dL (7.0 mmol/L) or higher

After Meals (2 hours postprandial)

• Normal: Less than 140 mg/dL (7.8 mmol/L)
• Prediabetes: 140-199 mg/dL (7.8-11.0 mmol/L)
• Diabetes: 200 mg/dL (11.1 mmol/L) or higher

How to Use This Calculator

1. Enter your blood sugar reading
2. Select the current unit (mg/dL or mmol/L)
3. The calculator will:
   • Convert between units
   • Indicate if the level is normal, prediabetic, or diabetic
   • Provide relevant health recommendations

Important Health Considerations

When to Check Blood Sugar

• First thing in the morning (fasting)
• Before meals
• 2 hours after meals
• Before and after exercise
• Before bedtime

Factors Affecting Blood Sugar

• Food intake
• Physical activity
• Medications
• Stress
• Illness
• Hormonal changes
• Time of day

Medical Disclaimer

This calculator is for educational purposes only and should not be used for medical decisions. Always consult with a healthcare provider for:

• Proper interpretation of blood sugar readings
• Diagnosis of diabetes or prediabetes
• Changes to medication or treatment plans
• Personalized target ranges
• Management of blood sugar levels

Emergency Warning Signs

Seek immediate medical attention if you experience:

• Very high blood sugar (over 250 mg/dL or 13.9 mmol/L) with symptoms
• Very low blood sugar (below 70 mg/dL or 3.9 mmol/L)
• Confusion, extreme thirst, or loss of consciousness
• Severe nausea or vomiting
• Difficulty breathing

Remember: Regular monitoring and proper understanding of blood sugar levels are crucial for managing diabetes and overall health. Always work with healthcare professionals to develop an appropriate monitoring and management plan.