Convert µg/dL to mmol/L or µmol/L and back using the substance’s molar mass, with presets for cortisol, iron, lead and other common lab tests.
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ug/dL to mmol/L Conversion Formula
The following formula is used to convert a concentration from µg/dL to mmol/L:
mmol/L = (µg/dL) × 0.01 ÷ molar mass (g/mol).
Variables:
- C (mmol/L) is the concentration in millimoles per liter
- C (µg/dL) is the concentration in micrograms per deciliter
- MW (g/mol) is the molecular weight in grams per mole
To convert the concentration, divide the concentration in µg/dL by the molecular weight and then multiply by 0.01 to convert to mmol/L.
| µg/dL | mmol/L |
|---|---|
| 0.5 | 0.000024 |
| 1 | 0.000048 |
| 2 | 0.000097 |
| 3.5 | 0.000169 |
| 5 | 0.000241 |
| 7.5 | 0.000362 |
| 10 | 0.000483 |
| 12 | 0.000579 |
| 15 | 0.000724 |
| 20 | 0.000965 |
| 25 | 0.001207 |
| 30 | 0.001448 |
| 35 | 0.001689 |
| 40 | 0.001931 |
| 45 | 0.002172 |
| 50 | 0.002413 |
| 60 | 0.002896 |
| 70 | 0.003378 |
| 80 | 0.003861 |
| 100 | 0.004826 |
| * Rounded to 6 decimals. Assumes elemental Lead (Pb), conventional single-value molar mass = 207.2 g/mol; natural isotopic composition varies. Relationship: mmol/L = (µg/dL) / 20720 ≈ (µg/dL) × 0.000048263. | |
What is a ug/dL to mmol/L Conversion?
The conversion from micrograms per deciliter to millimoles per liter is a common calculation in medical and scientific fields, particularly in clinical chemistry where blood, plasma, and serum component concentrations are often measured. This conversion is necessary to compare concentrations across different units of measurement or to adhere to standard units in scientific literature.
How to Convert ug/dL to mmol/L?
The following steps outline how to convert the concentration from µg/dL to mmol/L.
- First, determine the concentration in µg/dL.
- Select a substance preset or enter a custom molar mass in g/mol for the chemical form measured.
- Use the conversion formula: C (mmol/L) = (C (µg/dL) / MW (g/mol)) * 0.01.
- Finally, calculate the concentration in mmol/L.
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem:
Use the following variables as an example problem to test your knowledge.
Concentration (µg/dL) = 150
Molecular Weight (g/mol) = 342.3
Result: 150 × 0.01 ÷ 342.3 ≈ 0.00438212 mmol/L. To solve for molar mass, both concentrations must be positive and refer to the same substance and sample. This calculator converts units; it does not interpret a laboratory result.
Preset molar masses are rounded values. Use the chemical form and molar mass specified by the applicable method. References: NIST glucose molar mass; PubChem cortisol; CIAAW lead atomic weight.
