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- mg/dL to mmol/L
mg/dL to mmol/L
There is no single mg/dL to mmol/L factor. mg/dL counts the mass of a substance, mmol/L the number of its molecules, so the factor depends on the substance’s molar mass. Here are the 8 lab tests Soma converts in these units.
Tests and factors
| Test | Units | US → SI | SI → US | Molar mass |
|---|---|---|---|---|
| Glucose | mg/dL ⇄ mmol/L | × 0.055506 | × 18.016 | 180.16 g/mol |
| Cholesterol (total, LDL, HDL, non-HDL) | mg/dL ⇄ mmol/L | × 0.025863 | × 38.665 | 386.65 g/mol |
| Triglycerides | mg/dL ⇄ mmol/L | × 0.011291 | × 88.57 | 885.7 g/mol |
| Urea | mg/dL ⇄ mmol/L | × 0.1665 | × 6.006 | 60.06 g/mol |
| Urea nitrogen (BUN) | mg/dL ⇄ mmol/L | × 0.35696 | × 2.8014 | 28.014 g/mol |
| Calcium | mg/dL ⇄ mmol/L | × 0.24951 | × 4.0078 | 40.078 g/mol |
| Magnesium | mg/dL ⇄ mmol/L | × 0.41144 | × 2.4305 | 24.305 g/mol |
| Phosphate (as phosphorus) | mg/dL ⇄ mmol/L | × 0.32285 | × 3.0974 | 30.974 g/mol |
The molar masses are the ones the Soma app converts with; each links to its compound on PubChem (U.S. National Library of Medicine). HbA1c uses the IFCC–NGSP master equation instead of a molar mass. Urea nitrogen counts the two nitrogen atoms of urea; phosphate is measured as phosphorus. Prolactin and insulin have no molar mass in these units: each uses the factor of the international standard its tests are calibrated to. ALT and AST count enzyme activity: 1 µkat/L is 60 U/L by definition. Mention of a source doesn’t mean it endorses Soma.
mmol/L = mg/dL ÷ 18.016 · molar mass 180.16 g/mol
Glucose: formula and common values →This converter changes units only. It doesn’t tell you whether a number is in or out of any range: that depends on the range printed by your own lab, and on your doctor. Soma does not diagnose and is not medical advice.
Questions
Why is there no single mg/dL to mmol/L factor?
Going from mass to molecules needs the mass of one mole of the substance, and every substance has its own. So each test has its own factor: Glucose: divide mg/dL by 18.016; Cholesterol: divide mg/dL by 38.665; Triglycerides: divide mg/dL by 88.57.
How do I convert mg/dL to mmol/L?
Find your test in the table and multiply by its factor; to go back, multiply by the other one. For example, 100 mg/dL of glucose is 5.55 mmol/L.
By unit pair
Soma converts straight from the PDF
Share a lab report to Soma, and it reads every row on your phone and converts the units for you, so a Quest result in mg/dL and a Synlab result in mmol/L sit on one chart, each against its own lab’s range. No account, nothing uploaded.