mol to ng Converter
To convert mol to ng, multiply the value in moles by the molecular weight (g/mol), then multiply by 1,000,000,000.
How to Convert mol to ng
Use this mol to ng converter to express a mole amount as a mass in nanograms. Enter the moles and the molecular weight of the substance.
Nanograms are one billionth of a gram. So you multiply moles by the molecular weight to get grams, then by 1,000,000,000 to get nanograms.
For example, cholesterol has a molecular weight of about 386.664 g/mol. So 1 × 10−9 mol (1 nmol) of cholesterol is 386.664 ng.
ng = mol × MW × 1,000,000,000Multiply the moles by the molecular weight (g/mol), then multiply by 1,000,000,000 (10⁹) to get nanograms.Conversion Formula
The formula to convert mol to ng is:
Where:
- mol = amount in moles
- ng = mass in nanograms (10⁻⁹ g)
- MW = molecular weight (molar mass) in g/mol
Conversion Table
Common mol to ng conversions are shown below. The last column uses cholesterol (MW 386.664 g/mol) as an example.
| mol | ng (formula) | ng for cholesterol |
|---|---|---|
| 0.01 | 10,000,000 × MW | 3,866,640,000 |
| 0.1 | 100,000,000 × MW | 38,666,400,000 |
| 0.33 | 330,000,000 × MW | 127,599,120,000 |
| 0.5 | 500,000,000 × MW | 193,332,000,000 |
| 1 | 1,000,000,000 × MW | 386,664,000,000 |
| 2.5 | 2,500,000,000 × MW | 966,660,000,000 |
| 5 | 5,000,000,000 × MW | 1.93332 × 10¹² |
| 10 | 10,000,000,000 × MW | 3.86664 × 10¹² |
| 33 | 33,000,000,000 × MW | 1.2759912 × 10¹³ |
| 50 | 50,000,000,000 × MW | 1.93332 × 10¹³ |
| 100 | 100,000,000,000 × MW | 3.86664 × 10¹³ |
| 250 | 250,000,000,000 × MW | 9.6666 × 10¹³ |
| 500 | 500,000,000,000 × MW | 1.93332 × 10¹⁴ |
| 1,000 | 1 × 10¹² × MW | 3.86664 × 10¹⁴ |
Worked Examples
Here are some common examples of mol to ng conversion, using cholesterol (MW 386.664 g/mol):
- 386,664,000,000 ng = 1 mol
- 1.93332 × 10¹² ng = 5 mol
- 1.2759912 × 10¹³ ng = 33 mol
- 3.86664 × 10¹³ ng = 100 mol
Unit Definitions
What is a mole (mol)?
The mole (mol) is the SI base unit for amount of substance. It counts particles, such as atoms, molecules or ions.
Since 2019, one mole contains exactly 6.02214076 × 1023 particles. This number is the Avogadro constant.
What is a nanogram (ng)?
A nanogram (ng) is a unit of mass equal to 10⁻⁹ gram.
The prefix nano- (n) means 10⁻⁹, or one billionth. So 1 ng = 0.000000001 g.
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 mol to ng, you multiply by MW, then multiply by 1,000,000,000. The extra step (× 1,000,000,000) only adjusts for the different sizes of the two units.
Uses and Importance of mol and ng
Nanogram masses appear in trace analysis, hormone chemistry and forensic testing, where only tiny amounts are present.
Mass spectrometry standards
Internal standards are often added in nanogram amounts. Converting from moles tells you the mass to spike.
Environmental testing
Pollutants in water or soil are often reported in ng. Converting from moles helps compare with safety limits.
Steroid chemistry
Sterols such as cholesterol and steroid hormones are often measured at nanogram levels in small samples.
Frequently Asked Questions (FAQ)
What is the shortcut from nmol to ng?
For nanomoles, ng = nmol × MW. From moles, you also multiply by 109.
How many ng are in 1 mol of cholesterol?
1 × 386.664 × 109 = 386,664,000,000 ng, which is about 387 g.
Why is the answer so large for 1 mol?
A mole of any substance is a large amount, and a nanogram is tiny. So the number of nanograms is huge.
Is ng the same as nanogram?
Yes. ng is the SI symbol for nanogram, which is 10−9 g.
Where can I check atomic weights?
IUPAC's Commission on Isotopic Abundances and Atomic Weights (CIAAW) publishes the standard values.
Other Related Tools
Accuracy and Scope
The result depends on the molecular weight you enter.
At nanogram levels, weighing errors are large; such amounts are usually prepared by dilution, not by direct weighing.
Sources