Convert mmol/L and mg/dL with clinical-style context
Enter one or more values to see precise conversions, ranges, and steps.
Converted readings with ranges, steps, and export options
No values converted yet. Enter readings on the left and press Convert Values to see detailed results here, then export CSV or PDF.
Use this sample table to understand typical fasting and post-meal interpretations.
| Scenario | mmol/L | mg/dL | Context | Interpretation (general) |
|---|---|---|---|---|
| Healthy fasting | 4.9 | 88 | Fasting | Within common fasting reference range |
| Borderline fasting | 6.3 | 114 | Fasting | Elevated, possible prediabetes (fasting) |
| High post-meal | 11.5 | 207 | 2-hour Post-meal | High, may meet post-meal diabetes threshold |
Thresholds vary by guideline and individual factors. Always confirm with a healthcare professional.
This calculator converts units specifically for glucose measurements. You can choose between a precise or standard factor:
- Precise: mg/dL = mmol/L × 18.0182
- Standard: mg/dL = mmol/L × 18
- Reverse: mmol/L = mg/dL ÷ factor selected above
Use the precise factor for detailed analysis or research. Use the standard factor where local clinical tools round to 18.
- Select direction: mmol/L to mg/dL or mg/dL to mmol/L.
- Choose clinical context to display relevant interpretation hints.
- Pick decimal precision and preferred conversion factor mode.
- Add an optional session label to tag this batch of readings.
- Paste or type multiple values separated by spaces, commas, or lines.
- Enable summary to view count, average, and range of results.
- Export the table as CSV or PDF for sharing or record keeping.
Different regions, labs, and glucose meters use different units. A precise converter prevents misreading results, especially when comparing lab reports, research articles, device exports, and international diabetes guidelines across systems.
Consistent units help your care team interpret changes correctly and avoid errors.
Many guidelines consider fasting values roughly 4.0–5.5 mmol/L (about 72–99 mg/dL) as a common healthy interval for many adults.
Post-meal targets are often lower than 7.8 mmol/L (about 140 mg/dL) at two hours, but recommended ranges differ by source.
Always double-check meter units, record the time and context of each test, and keep converted values in the same unit used for your treatment plan.
Use this converter with session labels and exports to maintain clean, comparable records.
1. What is the difference between mmol/L and mg/dL?
mmol/L measures the number of glucose molecules per liter. mg/dL measures the mass of glucose in one deciliter. Both describe the same value; this calculator converts precisely between them using your selected factor.
2. Which conversion factor should I use, 18 or 18.0182?
Many clinicians use 18 for quick mental conversion. The precise molecular weight factor 18.0182 is slightly more accurate. This tool lets you choose either mode, depending on guideline preference and reporting requirements.
3. Can I use this converter for any laboratory test?
It is designed only for blood glucose values. Do not use it for other lab analytes or medications. Always confirm reference ranges for fasting, post-meal, pregnancy, or special conditions with your healthcare provider.
4. Why do my lab report and glucose meter show different units?
Different countries, labs, and devices prefer different units by convention. If your report or meter uses mmol/L or mg/dL only, convert values here so trends, targets, and treatment adjustments remain consistent across all records.
5. Is this calculator suitable for CGM or data exports?
Yes. You can paste continuous glucose monitor exports as spaced or comma-separated values. The converter will batch convert them, summarize ranges, and let you download CSV or PDF for deeper visualization in external tools.
6. Can this tool replace medical advice or diagnosis?
No. This calculator supports education and record formatting only. It does not diagnose, treat, or adjust medication. Discuss all readings, trends, and conversion concerns with your doctor or diabetes care team before changing your management plan.
This converter is for educational and self-monitoring support only. Reference ranges are generalized and may not apply to your situation. Always consult your doctor or diabetes care team before making treatment decisions.