Calcium unit converter
Bone and heart health (total calcium)
Also known as: Ca, Total calcium, Serum calcium, Kalzium, Calcémie, Calcio
Converter
Enter a value in any unit and all other units fill in.
Worked example
2.4 mmol/L (middle of the reference range) = 9.62 mg/dL
Conversion formulas
| g/L | g/L = mmol/L × 0.04008 | mmol/L = g/L × 24.95 |
|---|---|---|
| mEq/L | mEq/L = mmol/L × 2 | mmol/L = mEq/L × 0.5 |
| mg/dL | mg/dL = mmol/L × 4.008 | mmol/L = mg/dL × 0.2495 |
| mg/L | mg/L = mmol/L × 40.08 | mmol/L = mg/L × 0.02495 |
| µmol/L | µmol/L = mmol/L × 1000 | mmol/L = µmol/L × 0.001 |
| µg/dL | µg/dL = mmol/L × 4008 | mmol/L = µg/dL × 0.0002495 |
Reference range
| Unit | Adults |
|---|---|
| g/L | 0.0882 – 0.1042 |
| mmol/L | 2.2 – 2.6 |
| mEq/L | 4.4 – 5.2 |
| mg/dL | 8.818 – 10.42 |
| mg/L | 88.18 – 104.2 |
| µmol/L | 2200 – 2600 |
| µg/dL | 8818 – 10 421 |
Source: Pathology Harmony Group (ACB, IBMS, RCPath): Agreed Adult Clinical Biochemistry Reference Intervals, January 2011 · Last reviewed: 2026-10-14
Note from the source: 2.2-2.6 mmol/L for albumin-adjusted calcium (normalised to a mean calcium of 2.4 mmol/L). UK Pathology Harmony consensus of the Association for Clinical Biochemistry, the Institute of Biomedical Science and the Royal College of Pathologists.