Glucose Conversion Calculator
mg/dL to mmol/L blood sugar.
Enter your values
Enter the value you are working with.
Choose one of: mg/dL, mmol/L.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- mg/dL
- 126
- mmol/L
- 6.99
- Fasting interpretation
- Diabetes range (fasting)
- Estimated A1C if this is average
- 6.02%
Quick answer
Divide mg/dL by 18.016 to get mmol/L; multiply mmol/L by 18.016 to go back.
mmol/L = mg/dL ÷ 18.016
At a glance
| What it does | mg/dL to mmol/L blood sugar. |
|---|---|
| Category | Health |
| Inputs needed | Value, Unit |
| Main output | mg/dL |
| Formula | mmol/L = mg/dL ÷ 18.016 |
| Cost | Free — no sign-up, no download |
How to use the Glucose Conversion Calculator
- 1Enter your glucose reading.
- 2Select the unit it was measured in.
- 3Read both units and the interpretation.
Inputs explained
- Value
- Enter the value you are working with.
- Unit
- Choose one of: mg/dL, mmol/L.
Worked example
Using the values the calculator loads with:
Inputs
- Value126
- Unitmg/dL
Results
- mg/dL126
- mmol/L6.99
- Fasting interpretationDiabetes range (fasting)
- Estimated A1C if this is average6.02%
Frequently asked questions
Which unit does my country use?
The US uses mg/dL; the UK, Australia and most of Europe use mmol/L.
What is a normal fasting glucose?
70–99 mg/dL, or 3.9–5.5 mmol/L.
What do I need to enter into the Glucose Conversion Calculator?
Just 2 values: value, unit. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Glucose Conversion Calculator work out the answer?
Divide mg/dL by 18.016 to get mmol/L; multiply mmol/L by 18.016 to go back. It applies the formula mmol/L = mg/dL ÷ 18.016 and shows the working so you can check each step by hand.
Is the Glucose Conversion Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.