nmol to µg Converter
To convert nmol to µg, multiply the value in nanomoles by the molecular weight (g/mol), then divide by 1,000.
How to Convert nmol to µg
Use this nmol to µg converter to change nanomoles into micrograms. Enter nmol and the molecular weight.
nmol × MW gives nanograms. Divide by 1,000 to get micrograms: µg = nmol × MW ÷ 1,000.
For example, 20 nmol of cortisol (MW 362.466 g/mol) is 20 × 362.466 ÷ 1,000 = 7.24932 µg.
µg = nmol × MW ÷ 1,000Multiply the nanomoles by the molecular weight (g/mol), then divide by 1,000 to get micrograms.Conversion Formula
The formula to convert nmol to µg is:
Where:
- nmol = amount in nanomoles (10⁻⁹ mol)
- µg = mass in micrograms (10⁻⁶ g)
- MW = molecular weight (molar mass) in g/mol
Conversion Table
Common nmol to µg conversions are shown below. The last column uses cortisol (MW 362.466 g/mol) as an example.
| nmol | µg (formula) | µg for cortisol |
|---|---|---|
| 0.01 | 0.00001 × MW | 0.00362466 |
| 0.1 | 0.0001 × MW | 0.0362466 |
| 0.33 | 0.00033 × MW | 0.11961378 |
| 0.5 | 0.0005 × MW | 0.181233 |
| 1 | 0.001 × MW | 0.362466 |
| 2.5 | 0.0025 × MW | 0.906165 |
| 5 | 0.005 × MW | 1.81233 |
| 10 | 0.01 × MW | 3.62466 |
| 33 | 0.033 × MW | 11.961378 |
| 50 | 0.05 × MW | 18.1233 |
| 100 | 0.1 × MW | 36.2466 |
| 250 | 0.25 × MW | 90.6165 |
| 500 | 0.5 × MW | 181.233 |
| 1,000 | 1 × MW | 362.466 |
Worked Examples
Here are some common examples of nmol to µg conversion, using cortisol (MW 362.466 g/mol):
- 0.362466 µg = 1 nmol
- 1.81233 µg = 5 nmol
- 11.961378 µg = 33 nmol
- 36.2466 µg = 100 nmol
Unit Definitions
What is a nanomole (nmol)?
A nanomole (nmol) is a unit of amount of substance equal to 10⁻⁹ mole.
The prefix nano- (n) means 10⁻⁹, or one billionth. So 1 nmol = 0.000000001 mol.
What is a microgram (µg)?
A microgram (µg) is a unit of mass equal to 10⁻⁶ gram.
The prefix micro- (µ) means 10⁻⁶, or one millionth. So 1 µg = 0.000001 g.
It is often written as “mcg” on labels, to avoid confusing µg with mg.
Why Is Molecular Weight Needed?
Moles count particles. Grams measure mass. One particle of each substance has its own mass, so the link between them is the molecular weight (MW), also called molar mass.
MW tells you how many grams one mole of a substance weighs. For example, one mole of water weighs about 18.015 g, while one mole of glucose weighs about 180.16 g.
Therefore, to convert nmol to µg, you multiply by MW, then divide by 1,000. The extra step (÷ 1,000) only adjusts for the different sizes of the two units.
Uses and Importance of nmol and µg
nmol and µg often meet in hormone chemistry and pharmacology, where standards and doses are small.
Hormone standards
Reference materials for steroid assays are often supplied in µg, while calculations use nmol.
Cell treatments
A treatment planned in nmol can be converted to µg to check it against a label.
Unit links in lab reports
Cortisol can be reported as µg/dL or nmol/L. The molecular weight connects the two.
Frequently Asked Questions (FAQ)
How many µg are in 1 nmol of cortisol?
1 × 362.466 ÷ 1,000 = 0.362466 µg.
Where does the ÷ 1,000 come from?
nmol × MW gives ng, and there are 1,000 ng in 1 µg.
How does this relate to the cortisol factor 27.6?
Labcorp converts blood cortisol from µg/dL to nmol/L with 27.6. That equals 10,000 ÷ 362.466.
Is nmol to µg the same factor as µmol to mg?
Yes. Both steps shift by the same power of ten.
Can this tell me if a cortisol level is normal?
No. It converts units only.
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Accuracy and Scope
The result depends on the molecular weight you enter.
This converter does not interpret hormone levels.
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