pmol to ng Converter
To convert pmol to ng, multiply the value in picomoles by the molecular weight (g/mol), then divide by 1,000.
How to Convert pmol to ng
Use this pmol to ng converter to change picomoles into nanograms. Enter pmol and the molecular weight.
pmol × MW gives picograms. Divide by 1,000 to get nanograms: ng = pmol × MW ÷ 1,000.
For example, 50 pmol of estradiol (MW 272.388 g/mol) is 50 × 272.388 ÷ 1,000 = 13.6194 ng.
ng = pmol × MW ÷ 1,000Multiply the picomoles by the molecular weight (g/mol), then divide by 1,000 to get nanograms.Conversion Formula
The formula to convert pmol to ng is:
Where:
- pmol = amount in picomoles (10⁻¹² mol)
- ng = mass in nanograms (10⁻⁹ g)
- MW = molecular weight (molar mass) in g/mol
Conversion Table
Common pmol to ng conversions are shown below. The last column uses estradiol (MW 272.388 g/mol) as an example.
| pmol | ng (formula) | ng for estradiol |
|---|---|---|
| 0.01 | 0.00001 × MW | 0.00272388 |
| 0.1 | 0.0001 × MW | 0.0272388 |
| 0.33 | 0.00033 × MW | 0.08988804 |
| 0.5 | 0.0005 × MW | 0.136194 |
| 1 | 0.001 × MW | 0.272388 |
| 2.5 | 0.0025 × MW | 0.68097 |
| 5 | 0.005 × MW | 1.36194 |
| 10 | 0.01 × MW | 2.72388 |
| 33 | 0.033 × MW | 8.988804 |
| 50 | 0.05 × MW | 13.6194 |
| 100 | 0.1 × MW | 27.2388 |
| 250 | 0.25 × MW | 68.097 |
| 500 | 0.5 × MW | 136.194 |
| 1,000 | 1 × MW | 272.388 |
Worked Examples
Here are some common examples of pmol to ng conversion, using estradiol (MW 272.388 g/mol):
- 0.272388 ng = 1 pmol
- 1.36194 ng = 5 pmol
- 8.988804 ng = 33 pmol
- 27.2388 ng = 100 pmol
Unit Definitions
What is a picomole (pmol)?
A picomole (pmol) is a unit of amount of substance equal to 10⁻¹² mole.
The prefix pico- (p) means 10⁻¹², or one trillionth. So 1 pmol = 0.000000000001 mol.
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 pmol to ng, 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 pmol and ng
pmol and ng are common in hormone and peptide work. This conversion helps move between molar results and mass-based standards.
Hormone calibrators
Calibrators are often prepared by mass (ng) while results are reported in pmol/L.
Peptide loading
Peptide amounts loaded on instruments are described in pmol or ng.
Unit cross-checks
Converting pmol to ng confirms that a mass-based and a molar-based report agree.
Frequently Asked Questions (FAQ)
How many ng are in 1 pmol of estradiol?
1 × 272.388 ÷ 1,000 ≈ 0.2724 ng.
How do I get from pg to ng in the last step?
pmol × MW gives pg. Divide by 1,000, because 1 ng = 1,000 pg.
How many pmol are in 1 ng of estradiol?
1 ÷ 272.388 × 1,000 ≈ 3.671 pmol. This is the same number as the pg/mL to pmol/L factor.
Can I use this for peptides?
Yes. Enter the peptide's molecular weight. Peptides are often much heavier than steroids.
Does this interpret estradiol results?
No. It converts units only.
Other Related Tools
Accuracy and Scope
The result depends on the molecular weight you enter.
This tool does not interpret hormone levels.
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