Glucose Units (mg/dL ↔ mmol/L)
The US and Korea report mg/dL while Europe uses mmol/L. Because of glucose’s molar mass you divide by 18 — 100 mg/dL is 5.6 mmol/L.
Your numbers
mmol/L
5.56mmol/L
HbA1c (%)
5.1%
Formula
mmol/L = Glucose (mg/dL) ÷ 18
The second figure estimates the HbA1c that this glucose level would produce if sustained.
What to enter
| Input | Default | Accepted range |
|---|---|---|
| Glucose (mg/dL) (mg/dL)Blood sugar; whether it is fasting or after a meal changes everything. | 100 | 10 ~ 900 |
Step by step
Quick reference table
Results when only Glucose (mg/dL) (mg/dL) changes and everything else stays put.
| Glucose (mg/dL) (mg/dL) | mmol/L (mmol/L) | HbA1c (%) (%) |
|---|---|---|
| 50 | 2.78 | 3.4 |
| 75 | 4.17 | 4.2 |
| 100 | 5.56 | 5.1 |
| 150 | 8.33 | 6.9 |
| 200 | 11.11 | 8.6 |
What each result means
| Result | At default values |
|---|---|
| mmol/L (mmol/L)The European blood-sugar unit — mg/dL divided by 18. | 5.56 |
| HbA1c (%) (%)Blood sugar averaged over the past two to three months. | 5.1 |
Common mistakes
The second figure estimates the HbA1c that this glucose level would produce if sustained.
Glossary
- Glucose (mg/dL)
- Blood sugar; whether it is fasting or after a meal changes everything.
- mmol/L
- The European blood-sugar unit — mg/dL divided by 18.
- HbA1c (%)
- Blood sugar averaged over the past two to three months.
Frequently asked questions
Q. How is Glucose Units (mg/dL ↔ mmol/L) calculated?
mmol/L = Glucose (mg/dL) ÷ 18 — The US and Korea report mg/dL while Europe uses mmol/L. Because of glucose’s molar mass you divide by 18 — 100 mg/dL is 5.6 mmol/L.
Q. Can you walk through an example?
With Glucose (mg/dL) 100mg/dL, the answer is mmol/L 5.56mmol/L.
Q. What do I need to enter?
Enter Glucose (mg/dL). The result recalculates as you type, and an empty box counts as zero.
Q. How much does the answer move if I change a number?
Changing only Glucose (mg/dL) (mg/dL) moves the answer to Glucose (mg/dL) (mg/dL) 50 → mmol/L (mmol/L) 2.78 and Glucose (mg/dL) (mg/dL) 200 → mmol/L (mmol/L) 11.11. The table below lays out five steps.
Q. How are the numbers rounded?
Money is shown to the nearest whole unit, percentages to one decimal place and everything else to two. What you see is rounded; the calculation itself carries the unrounded value forward.
Q. Anything to watch out for?
The second figure estimates the HbA1c that this glucose level would produce if sustained.
Related calculators
These calculators help you understand health figures; they do not replace diagnosis or prescription. See a clinician if you have symptoms.