Calcium (Ca)
Calcium is an essential mineral that your body needs for building strong bones and teeth, helping your heart and other muscles work properly, and supporting nerve signaling.
Category: Metabolic Panel
Also known as: calcium, ca, serum calcium, total calcium, kalcijum
Reference range: 8.5–10.5 mg/dL (Source: ABIM)
Standard unit: mg/dL
High values may indicate
High calcium levels (hypercalcemia) may indicate hyperparathyroidism, cancer, excessive vitamin D intake, or kidney disease.
Low values may indicate
Low calcium levels (hypocalcemia) may indicate vitamin D deficiency, hypoparathyroidism, kidney disease, or malnutrition.
Frequently asked questions
- What is a normal Calcium (Ca) level?
- A typical reference range for Calcium (Ca) is 8.5–10.5 mg/dL (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is Calcium (Ca) measured in?
- Calcium (Ca) is most commonly reported in mg/dL. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do Calcium (Ca) reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track Calcium (Ca) over time?
- Yes. Upload results from any lab and BloodId charts your Calcium (Ca) over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: MedlinePlus, U.S. National Library of Medicine
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