Enter the concentration in nanomolar (nM) and the molecular weight in g/mol into the calculator to determine the concentration in micrograms per milliliter (µg/mL).
Quick Overview: nM to µg/mL
Converting nanomolar (nM) to micrograms per milliliter (µg/mL) requires the compound’s molecular weight (MW) in g/mol.
Formula: µg/mL = nM × MW ÷ 1,000,000
- 1,000 nM of MW 100 g/mol = 0.10 µg/mL
- 500 nM of MW 250 g/mol = 0.125 µg/mL
- 10,000 nM of MW 300 g/mol = 3.00 µg/mL
- 50 nM of MW 500 g/mol = 0.025 µg/mL
The conversion uses the molar concentration and molecular weight to calculate the equivalent mass concentration directly in µg/mL.
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nM to µg/mL Formula
The following formula is used to convert a concentration from nanomolar (nM) to micrograms per milliliter (µg/mL).
µg/mL = (nM × MW) / 1,000,000
Variables:
- µg/mL is the concentration in micrograms per milliliter
- nM is the concentration in nanomolar
- MW is the molecular weight of the compound in grams per mole (g/mol)
To calculate µg/mL, multiply the concentration in nM by the molecular weight, then divide by 1,000,000.
Useful molecular weight ranges often include the following:
- Small molecules: about 100–1,000 g/mol
- Peptides and small proteins: about 1,000–20,000 g/mol
- Large proteins: tens of thousands of g/mol or more
What is nM to µg/mL?
Nanomolar (nM) is a molar concentration unit that describes how many moles of a substance are present per liter of solution. Micrograms per milliliter (µg/mL) is a mass concentration unit that describes how much of the substance is present by weight in each milliliter. Because one unit is molar and the other is mass-based, the conversion depends on the compound’s molecular weight.
This conversion is commonly used in chemistry, biology, pharmacology, and laboratory work where concentrations may be reported in molar units in one protocol and mass units in another. Once the molecular weight is known, the conversion becomes straightforward.
For example, 1,000 nM of a compound with a molecular weight of 200 g/mol equals 0.20 µg/mL, while 1,000 nM of a compound with a molecular weight of 50 g/mol equals 0.05 µg/mL.
How to Convert nM to µg/mL?
The following steps outline how to convert nM to µg/mL.
- First, determine the concentration in nanomolar (nM).
- Next, determine the molecular weight of the compound in g/mol.
- Multiply the nM value by the molecular weight.
- Divide the result by 1,000,000 to convert the value into µg/mL.
- Check your answer with the calculator above.
Example Problem:
Use the following variables as an example problem to test your knowledge.
Concentration (nM) = 1,000
Molecular Weight (MW) = 200 g/mol
µg/mL = (1,000 × 200) / 1,000,000 = 0.20 µg/mL
nM to µg/mL Conversion Table
The table below shows example conversions for a 1,000 nM (1 µM) concentration of several representative compounds using the formula µg/mL = nM × MW ÷ 1,000,000.
| Compound | Molecular Weight (g/mol) | 1,000 nM in µg/mL |
|---|---|---|
| Sodium chloride (NaCl) | 58.44 | 0.0584 µg/mL |
| Glucose | 180.16 | 0.180 µg/mL |
| Caffeine | 194.19 | 0.194 µg/mL |
| Ibuprofen | 206.29 | 0.206 µg/mL |
| Ethanol | 46.07 | 0.0461 µg/mL |
| Insulin (human) | 5,808 | 5.81 µg/mL |
| Albumin (human serum) | 66,500 | 66.5 µg/mL |
Different laboratories and protocols may report concentrations in molar units such as nM or µM, or in mass units such as µg/mL. Knowing the molecular weight allows you to move between these units and compare values consistently.