Instant mmol/L to mg/dL Converter
Convert common blood test units from mmol/L to mg/dL in one click. Pick the analyte first, because each substance uses a different conversion factor.
Formula: mg/dL = mmol/L × 18.0182
What does mmol/L to mg/dL mean?
Laboratory tests can be reported in different unit systems depending on country, hospital, and lab software. In many places (including most of Europe, Canada, and Australia), blood chemistry often appears in mmol/L (millimoles per liter). In the United States, many tests are commonly shown in mg/dL (milligrams per deciliter).
This calculator helps you quickly convert mmol/L to mg/dL for common lab values such as blood glucose, cholesterol, and triglycerides.
Quick conversion factors
The conversion factor depends on molecular weight, so it is not the same for every test.
| Analyte | mmol/L → mg/dL | mg/dL → mmol/L |
|---|---|---|
| Glucose | × 18.0182 | ÷ 18.0182 |
| Cholesterol (total, LDL, HDL) | × 38.67 | ÷ 38.67 |
| Triglycerides | × 88.57 | ÷ 88.57 |
| Lactate | × 9.008 | ÷ 9.008 |
Formula used by the calculator
The tool applies a direct multiplication:
- mg/dL = mmol/L × conversion factor
Example (glucose):
- 5.6 mmol/L × 18.0182 = 100.90 mg/dL
Worked examples
Example 1: Fasting glucose
If your fasting glucose is 5.0 mmol/L, then:
5.0 × 18.0182 = 90.09 mg/dL
Example 2: Total cholesterol
If total cholesterol is 5.2 mmol/L, then:
5.2 × 38.67 = 201.08 mg/dL
Example 3: Triglycerides
If triglycerides are 1.7 mmol/L, then:
1.7 × 88.57 = 150.57 mg/dL
Why your doctor and app may show different numbers
It is normal to see small differences due to rounding. One tool might round to one decimal place while another keeps two or three decimals. Also, some systems use slightly simplified factors (for example, glucose ×18 instead of ×18.0182).
- Use the same calculator consistently for tracking trends.
- Compare values in the same unit whenever possible.
- Focus on long-term patterns, not tiny decimal differences.
When to use this converter
- Reading international lab reports
- Comparing old records from different clinics
- Logging values in health apps that use a different unit
- Understanding medical articles and diabetes/cholesterol guidelines
Frequently asked questions
Is mmol/L better than mg/dL?
Neither is better universally—they are simply different unit systems. What matters is using the correct range and interpretation for the unit shown.
Can I use this for HbA1c?
No. HbA1c has its own reporting formats (%, mmol/mol) and is not converted with mg/dL factors.
Does this calculator diagnose disease?
No. This tool is for unit conversion only. Clinical diagnosis always requires context from a licensed healthcare professional.