Mediki
Blood test unit converter
Convert lab results between the units different labs use, such as mmol/L and mg/dL. Pick a biomarker, enter your value, and see it in every unit.
Common blood test conversions
| Biomarker | Conversion | Reverse |
|---|---|---|
| Glucose | 1 mmol/L = 18 mg/dL | 1 mg/dL = 0.05556 mmol/L |
| Total Cholesterol | 1 mg/dL = 0.02586 mmol/L | 1 mmol/L = 38.66 mg/dL |
| Triglycerides | 1 mg/dL = 0.01129 mmol/L | 1 mmol/L = 88.57 mg/dL |
| Creatinine | 1 mg/dL = 0.0884 mmol/L | 1 mmol/L = 11.31 mg/dL |
| Vitamin D (25-OH) | 1 ng/mL = 2.496 nmol/L | 1 nmol/L = 0.4006 ng/mL |
| Vitamin B12 | 1 pg/mL = 0.7378 pmol/L | 1 pmol/L = 1.355 pg/mL |
| Hemoglobin | 1 g/dL = 10 g/L | 1 g/L = 0.1 g/dL |
| ALT | 1 µkat/L = 60 U/L | 1 U/L = 0.01667 µkat/L |
Why the same test has different units
Labs report the same substance either by mass (for example mg/dL) or by amount of substance (for example mmol/L). Converting between the two depends on the molecule's weight, which is why glucose, cholesterol and triglycerides each have their own factor. Enzymes are measured by activity instead, in U/L or µkat/L.
Mediki converts every result automatically when it reads your lab report, so results from different labs line up on one chart. Read more in how to read blood test results.
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Try 15 pages freeFrequently asked questions
How do I convert mmol/L to mg/dL?
It depends on the substance, because the factor comes from its molecular weight. For glucose, multiply mmol/L by 18. For cholesterol, multiply by about 38.67, and for triglycerides by about 88.57.
Why do labs use different units?
Most of the world uses SI units such as mmol/L, while the US commonly uses conventional units such as mg/dL. Both describe the same amount, just on a different scale.
Does the reference range change when I convert units?
Yes. Convert the reference range printed on your report with the same factor, or compare the result with the range in the unit it was reported in.
Medical disclaimer: This page is general information, not medical advice. Reference ranges differ between laboratories, and only a doctor can interpret your results in the context of your health.