Understanding Blood Glucose Units
Blood glucose (blood sugar) levels can be measured in two different units depending on the country or healthcare system. Understanding the conversion between these units is essential for managing diabetes effectively, especially when traveling or using international medical resources.
The Conversion Formula
mg/dL = mmol/L x 18.0182mmol/L = mg/dL / 18.0182
The factor 18.0182 comes from the molecular weight of glucose (180.182 g/mol) divided by 10.
Which Countries Use Which Units?
mg/dL (milligrams per deciliter)
Used in:
- United States
- Japan
- France
- Egypt
- Colombia
- Israel
mmol/L (millimoles per liter)
Used in:
- United Kingdom
- Canada
- Australia
- China
- Most of Europe
- Most of Asia
Blood Glucose Target Ranges
For Non-Diabetics
- Fasting: 70-99 mg/dL (3.9-5.5 mmol/L)
- 2 hours after eating: Less than 140 mg/dL (7.8 mmol/L)
For People with Diabetes (ADA Recommendations)
- Before meals: 80-130 mg/dL (4.4-7.2 mmol/L)
- 1-2 hours after meals: Less than 180 mg/dL (10.0 mmol/L)
Common Conversions Quick Reference
| mg/dL | mmol/L |
|---|---|
| 70 | 3.9 |
| 80 | 4.4 |
| 100 | 5.6 |
| 120 | 6.7 |
| 140 | 7.8 |
| 180 | 10.0 |
| 200 | 11.1 |
| 250 | 13.9 |
| 300 | 16.7 |
Medical Disclaimer
This converter is provided for informational purposes only. Blood glucose reference ranges may vary based on individual health conditions, age, and other factors. Always follow your healthcare provider's specific recommendations for blood glucose targets. If you experience symptoms of high or low blood sugar, seek medical attention immediately.
Frequently Asked Questions
How accurate are the results?
The Blood Glucose Converter applies a standard formula to your inputs — accuracy depends on how precisely you measure those inputs. For planning and estimation, results are reliable. For high-stakes or professional decisions, cross-check the output with a domain expert or primary source.
Can I use this to adjust my medication?
No. Medication decisions require a licensed clinician who can consider your full medical history, lab trends, concurrent medications, and contraindications. This calculator is for educational understanding only.
Common Tip Percentages
| Service | Typical Tip Range | Notes |
|---|---|---|
| Restaurant (sit-down) | 15–20% | 20%+ for exceptional service |
| Food delivery | 10–20% | Consider extra for long distances |
| Taxi / rideshare | 10–20% | More for assistance with luggage |
| Hotel housekeeping | $2–5/night | Leave daily, not just at checkout |
| Barber / hair salon | 15–20% | On pre-discount total |
| Pizza delivery | 10–15% or $3–5 minimum | Higher in bad weather |
General Household Budget Ratios (50/30/20 Rule)
| Category | % of Net Income | Examples |
|---|---|---|
| Needs | 50% | Rent, groceries, utilities, insurance |
| Wants | 30% | Dining out, entertainment, hobbies |
| Savings / Debt | 20% | Emergency fund, retirement, extra payments |
Common Measurement Conversions for Everyday Use
| Quantity | US / Imperial | Metric Equivalent |
|---|---|---|
| 1 cup | 8 fl oz | 237 mL |
| 1 pint | 16 fl oz | 473 mL |
| 1 quart | 32 fl oz | 946 mL |
| 1 gallon | 128 fl oz | 3.785 L |
| 1 lb | 16 oz | 453.6 g |
| 1 ft | 12 in | 30.48 cm |