Serum lipid values are reported as milligrams per deciliter (e.g. 200 mg/dL) or millimole per liter (e.g. 5.10 mmol/L). mmol/L is the SI unit (Systeme International d'Unites) which is in standard international measurement system. The SI unit considers the numbers of molecules of cholesterol in blood. The mole (symbol: mol) is a unit of amount of substance - the amount that contains as many "elemental entities", (in this case molecules) as there are atoms in 12 g of carbon-12. mmol is millimole or 1/1000 of mole.
In US, India and many other countries, the values for serum cholesterol are reported as mg/dL, while Australia, UK and Europe use SI units. Sometimes the patient gets confused when he (or she) look for lipid cholesterol level values in different units. The following tables can be used to convert the values from one system of units to another.
Total serum cholesterol
Convert from millimole per liter to milligram per deciliter mmol/L to mg/dL |
Conversion factor multiply by 1/0.02586 = 38.67 |
to get values in milligrams per deciliter mg/dL |
Example 5.30 mmol/L = 5.3 x 38.67 = 205 mg/dL |
To convert from milligram per deciliter to millimole per liter mg/dL to mmol/L, divide by 38.67 Example: 205 mg/dL = 205/38.67 = 5.3 mmol/L |
HDL cholesterol
Convert from millimole per liter to milligram per deciliter mmol/L to mg/dL |
Conversion factor multiply by 1/0.02586 = 38.67 |
to get values in milligram per deciliter mg/dL |
Example 0.9 mmol/L = 0.9 x 38.67 = 35 mg/dL |
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To convert from milligram per deciliter to millimole per liter mg/dL to mmol/L, divide by 38.67 Example: 35 mg/dL = 35/38.67 = 0.9 mmol/L
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LDL cholesterol
Convert from millimole per liter to milligram per deciliter mmol/L to mg/dL
|
Conversion factor multiply by 1/0.02586 = 38.67 |
to get values in milligrams per deciliter mg/dL |
Example 3.5 mmol/L = 3.5 x 38.67 = 135 mg/dL |
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To convert from milligram per deciliter to millimole per liter mg/dL to mmol/L, divide by 38.67 Example: 135 mg/dL = 135/38.67 = 3.5 mmol/L
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Serum triglycerides
Convert from millimole per liter to milligram per deciliter mmol/L to mg/dL
|
Conversion factor multiply by 1/0.01129 = 88.57 |
to get values in milligrams per deciliter mg/dL |
Example 1.90 mmol/L = 1.9 x 88.57 = 168 mg/dL |
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To convert from milligram per deciliter to millimole per liter mg/dL to mmol/L, divide by 88.57 Example: 168 mg/dL = 168/88.57 = 1.9 mmol/L
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Cholesterol molecular weight
Molar mass of C27H46O = 386.65354 g/mol
Molecular weight calculation: 12.0107*27 + 1.00794*46 + 15.9994
| Element |
Symbol |
Atomic Mass |
# of Atoms |
Mass Percent |
| Hydrogen |
H |
1.00794 |
46 |
11.991% |
| Carbon |
C |
12.0107 |
27 |
83.871% |
| Oxygen |
O |
15.9994 |
1 |
4.138% |
In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together. |