Glucose Calculator – Convert & Monitor Blood Sugar Levels
Tracking your blood sugar levels is essential for managing diabetes and maintaining a healthy lifestyle. Our free Glucose Calculator helps you convert between mg/dL and mmol/L, making it easy to understand your blood glucose data from lab results, glucometers, or reports. Whether you're a diabetic patient, fitness enthusiast, or a caregiver, this tool can guide you toward better health decisions.
What is a Glucose Calculator?
A Glucose Calculator is a health tool that helps individuals convert blood sugar readings between the two standard units: milligrams per deciliter (mg/dL) and millimoles per liter (mmol/L). These values are essential for evaluating glucose levels, particularly for individuals managing diabetes, pre-diabetes, or insulin resistance.
Different countries use different units. For example, the US commonly uses mg/dL, whereas mmol/L is standard in Canada and Europe. This calculator bridges that gap effortlessly.
How to Use the Glucose Calculator
- Enter your blood glucose value in mg/dL or mmol/L.
- Select the unit of your input.
- Click "Calculate" to convert the value to the opposite unit.
- View the result along with interpretation ranges (normal, pre-diabetic, diabetic).
Glucose Conversion Formula
The calculator uses the following formulas to convert between mg/dL and mmol/L:
- From mg/dL to mmol/L:
mmol/L = mg/dL ÷ 18 - From mmol/L to mg/dL:
mg/dL = mmol/L × 18
Example:
If your glucose level is 90 mg/dL:
mmol/L = 90 ÷ 18 = 5.0
This is considered a normal fasting blood sugar range.
Blood Sugar Level Chart (Fasting)
| Category | mg/dL | mmol/L |
|---|---|---|
| Normal | 70–99 | 3.9–5.5 |
| Prediabetes | 100–125 | 5.6–6.9 |
| Diabetes | 126 or above | 7.0 or above |
Why Use a Glucose Calculator?
- Instant and accurate unit conversion
- Helps diabetics interpret lab reports
- Supports better diabetes management
- Convenient for international travel or medical comparison
- Assists fitness and nutrition tracking apps
Who Should Use This Tool?
- Diabetics and pre-diabetics
- Doctors and nurses
- Fitness coaches and nutritionists
- Medical students and researchers
- General users tracking their health
FAQs about the Glucose Calculator
1. What is a normal blood sugar level?
Normal fasting blood sugar levels are between 70–99 mg/dL (or 3.9–5.5 mmol/L).
2. What’s the difference between mg/dL and mmol/L?
mg/dL is used in the US and represents milligrams of glucose per deciliter of blood. mmol/L is used in Europe/Canada and measures millimoles per liter of blood.
3. Is this calculator accurate for medical diagnosis?
This calculator is accurate for conversions but should not replace lab tests or professional medical diagnosis.
4. Can I use it for non-fasting glucose levels?
Yes, the calculator works for any glucose value, but interpretation ranges may vary for non-fasting results.
5. How often should I check my glucose levels?
It depends on your condition. Diabetics may check multiple times a day, while others may do so occasionally. Consult a healthcare provider for a schedule.