ng to mmol Converter
To convert ng to mmol, divide the value in nanograms by the molecular weight (g/mol), then divide by 1,000,000.
How to Convert ng to mmol
This ng to mmol converter changes nanograms into millimoles. Enter the mass in ng and the molecular weight.
Divide ng by the molecular weight to get nmol, then divide by 1,000,000 to get mmol: mmol = ng ÷ MW ÷ 1,000,000.
For example, 50,000 ng of uric acid (MW 168.112 g/mol) ≈ 0.0002974 mmol.
mmol = ng ÷ MW ÷ 1,000,000Divide the mass in ng by the molecular weight (g/mol), then divide by 1,000,000 to get millimoles.Conversion Formula
The formula to convert ng to mmol is:
Where:
- ng = mass in nanograms (10⁻⁹ g)
- mmol = amount in millimoles (10⁻³ mol)
- MW = molecular weight (molar mass) in g/mol
Conversion Table
Common ng to mmol conversions are shown below. The last column uses uric acid (MW 168.112 g/mol) as an example.
| ng | mmol (formula) | mmol for uric acid |
|---|---|---|
| 0.01 | 1 × 10⁻⁸ ÷ MW | 5.948415342 × 10⁻¹¹ |
| 0.1 | 1 × 10⁻⁷ ÷ MW | 5.948415342 × 10⁻¹⁰ |
| 0.33 | 3.3 × 10⁻⁷ ÷ MW | 1.962977063 × 10⁻⁹ |
| 0.5 | 5 × 10⁻⁷ ÷ MW | 2.974207671 × 10⁻⁹ |
| 1 | 0.000001 ÷ MW | 5.948415342 × 10⁻⁹ |
| 2.5 | 0.0000025 ÷ MW | 1.487103836 × 10⁻⁸ |
| 5 | 0.000005 ÷ MW | 2.974207671 × 10⁻⁸ |
| 10 | 0.00001 ÷ MW | 5.948415342 × 10⁻⁸ |
| 33 | 0.000033 ÷ MW | 1.962977063 × 10⁻⁷ |
| 50 | 0.00005 ÷ MW | 2.974207671 × 10⁻⁷ |
| 100 | 0.0001 ÷ MW | 5.948415342 × 10⁻⁷ |
| 250 | 0.00025 ÷ MW | 0.000001487103836 |
| 500 | 0.0005 ÷ MW | 0.000002974207671 |
| 1,000 | 0.001 ÷ MW | 0.000005948415342 |
Worked Examples
Here are some common examples of ng to mmol conversion, using uric acid (MW 168.112 g/mol):
- 5.948415342 × 10⁻⁹ mmol = 1 ng
- 2.974207671 × 10⁻⁸ mmol = 5 ng
- 1.962977063 × 10⁻⁷ mmol = 33 ng
- 5.948415342 × 10⁻⁷ mmol = 100 ng
Unit Definitions
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.
What is a millimole (mmol)?
A millimole (mmol) is a unit of amount of substance equal to 10⁻³ mole.
The prefix milli- (m) means 10⁻³, or one thousandth. So 1 mmol = 0.001 mol.
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 ng to mmol, you divide by MW, then divide by 1,000,000. The extra step (÷ 1,000,000) only adjusts for the different sizes of the two units.
Uses and Importance of ng and mmol
Converting tiny masses into millimoles lets you compare trace results with amounts written in mmol.
Comparing units in papers
A method paper may give a spike in ng while the stock is described in mmol. Converting links the two.
Uric acid chemistry
Uric acid is measured in many labs; its molecular weight connects mass and molar values.
Checking calculations
Converting ng to mmol and back is a quick way to spot a missing factor of one million.
Frequently Asked Questions (FAQ)
What is 1 ng of uric acid in mmol?
1 ÷ 168.112 ÷ 1,000,000 ≈ 5.948 × 10−9 mmol.
Is nmol a better unit for ng amounts?
Usually yes. ng ÷ MW gives nmol directly: 50,000 ng of uric acid is about 297.4 nmol.
What is uric acid's molecular weight?
Uric acid is C₅H₄N₄O₃, about 168.112 g/mol.
Why do I see scientific notation?
Small masses give very small millimole values. Powers of ten keep them readable.
Does this apply to salts such as urate?
Use the molecular weight of the exact form. A sodium urate salt has a different molecular weight from uric acid.
Other Related Tools
Accuracy and Scope
The result depends on the molecular weight you enter.
This converter does not interpret lab results.
Sources