Blood Sugar Converter (mg/dL to mmol/L)
Convert blood glucose between mg/dL and mmol/L, and convert A1C to estimated average glucose and back. Example: 100 mg/dL is 5.6 mmol/L, and an A1C of 7.0% equals an average glucose of 154 mg/dL.
FreeNo sign-up
Show steps
How to use the Blood Sugar Converter (mg/dL to mmol/L)
- Enter the values in the fields.
- Press Calculate to see the result with the steps shown.
Formula and method
Glucose (mmol/L) = glucose (mg/dL) / 18.0156. Estimated average glucose (mg/dL) = 28.7 x A1C – 46.7.
Quick conversion chart
| mg/dL | mmol/L | Comment |
|---|---|---|
| 54 | 3.0 | Level 2 low |
| 70 | 3.9 | Low threshold |
| 100 | 5.6 | Upper normal fasting |
| 126 | 7.0 | Diabetes fasting threshold |
| 180 | 10.0 | Common 2-hour target limit |
| 250 | 13.9 | High |
A1C and average glucose
| A1C | Average glucose (mg/dL) | mmol/L |
|---|---|---|
| 5.0% | 97 | 5.4 |
| 6.0% | 126 | 7.0 |
| 7.0% | 154 | 8.6 |
| 8.0% | 183 | 10.2 |
| 9.0% | 212 | 11.8 |
| 10.0% | 240 | 13.3 |
Why units differ
The US, Japan and some others use mg/dL, while Canada, the UK, Australia and most of Europe use mmol/L.
Cautions
This calculator is for education and is not medical advice. Decisions about testing and treatment belong with a qualified clinician.
Frequently asked questions
How do I convert mg/dL to mmol/L?
Divide by 18.
How do I convert mmol/L to mg/dL?
Multiply by 18.
What is a normal fasting glucose?
70 to 99 mg/dL (3.9 to 5.5 mmol/L).
What A1C equals 154 mg/dL?
7.0%.
Is the A1C conversion exact?
No, it is an average-based estimate.
What is a low blood sugar?
Below 70 mg/dL (3.9 mmol/L).
Sources
Related calculators
Related to This Article
More math articles
- How to Rationalize Radical Expressions? (+FREE Worksheet!)
- Why So Many Students Struggle with Math Anxiety and How to Deal with It
- Exploring the Alternating Series Test: Convergence and Divergence
- The Best Grade 6 ELA Practice Tests for Oklahoma Students
- Due Process and the Rights of the Accused: Counsel Explained
- Question Types on the ACT Math Test
- The Best Grade 3 ELA Practice Tests for Massachusetts Students
- South Dakota Smarter Balanced Grade 7 Math Worksheets: 95 Free Printable PDFs
- The Ultimate 7th Grade PEAKS Math Course (+FREE Worksheets)
- Political Opportunity and Framing
What people say about "Blood Sugar Converter: mg/dL to mmol/L and A1C to Average Glucose"?
No one replied yet.