Calcium: units, conversion and tracking
Updated
Short answer
Calcium is reported in mg/dL and mmol/L. 1 mmol/L = 4.008 mg/dL.
Convert calcium
Enter a value to see the converted result.
Converts units only and does not interpret a result. For other markers, use the full unit converter.
What is calcium?
A mineral that is also in bones; the blood level is tightly regulated.
BiomarkerHQ groups calcium under Vitamins and minerals. On lab reports it can also appear as calcium total, total calcium and serum calcium.
Calcium units and conversion
BiomarkerHQ stores each calcium result in the unit printed on the report, and charts and compares results in mg/dL.
1 mmol/L = 4.008 mg/dL
1 mg/dL = 0.2495 mmol/L
| mmol/L | mg/dL |
|---|---|
| 1.8 mmol/L | 7.214 mg/dL |
| 2 mmol/L | 8.016 mg/dL |
| 2.2 mmol/L | 8.817 mg/dL |
| 2.4 mmol/L | 9.619 mg/dL |
| 2.6 mmol/L | 10.42 mg/dL |
| 2.8 mmol/L | 11.22 mg/dL |
| 3 mmol/L | 12.02 mg/dL |
| mg/dL | mmol/L |
|---|---|
| 7 mg/dL | 1.747 mmol/L |
| 8 mg/dL | 1.996 mmol/L |
| 9 mg/dL | 2.246 mmol/L |
| 10 mg/dL | 2.495 mmol/L |
| 11 mg/dL | 2.745 mmol/L |
| 12 mg/dL | 2.994 mmol/L |
| 13 mg/dL | 3.244 mmol/L |
For another value, use the lab unit converter. It converts units only and does not interpret a result.
Tracking calcium over time
In BiomarkerHQ, each calcium result is saved with its collection date, its unit and the reference range printed on that report. The timeline charts the results across your draws against the range from each of your own reports, and any two draws can be compared side by side.
- Keep the unit printed on each report. Convert only to compare.
- Keep each report's own range with its result. See why ranges differ between labs.
- Compare the same lab and conditions where you can. See how to compare two blood tests.
Frequently asked questions
Which units do labs report calcium in?
Calcium is reported in mg/dL and mmol/L. BiomarkerHQ stores each result in the unit printed on the report and uses mg/dL for charts and comparisons.
How do I convert calcium from mmol/L to mg/dL?
1 mmol/L = 4.008 mg/dL. For example, 2.4 mmol/L is 9.619 mg/dL.
How do I convert calcium from mg/dL to mmol/L?
1 mg/dL = 0.2495 mmol/L. For example, 10 mg/dL is 2.495 mmol/L.
Does BiomarkerHQ interpret my calcium result?
No. It compares a result only with the reference range printed on your own lab report, as below, within or above, and does not say what the result means. Talk to a qualified clinician about your results.
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