Normal Range: 8.5 - 10.5 mg/dL or 2.2 - 2.7 mmol/L
Normal Range: 3.4 - 5.4 g/dL or 34 - 54 g/L
Normal Range: 3.4 - 5.4 g/dL or 34 - 54 g/L
Corrected Calcium Calculator
The corrected calcium calculator is used for adjusting the calcium level in a patient's blood based on their albumin level to provide a more accurate assessment of their calcium status.
What is Corrected calcium?
Corrected calcium refers to the value of calcium in the blood after it has been adjusted for the level of albumin, a protein that can affect calcium levels. The correction is important because a significant portion of calcium in the blood is bound to albumin, and changes in albumin levels can lead to misleading total calcium levels.
Formula
The commonly used formula to calculate corrected calcium is:
Corrected Calcium (mg/dL) = Serum Calcium (mg/dL) + [0.8 * (Normal Albumin – Patient’s Albumin (g/dL))]
In this formula:
- Normal Albumin is often assumed to be 4.0 g/dL, though this can vary based on laboratory standards.
- Serum Calcium is the total calcium level measured in the blood.
- Patient’s Albumin is the albumin level measured in the patient’s blood.
Normal ranges
Normal ranges for corrected calcium are typically between 8.5 and 10.2 mg/dL, but these values can slightly vary depending on the laboratory and the units used.
References:
- Parent X, Spielmann C, Hanser AM. Calcémie “corrigée”: sous-estimation du statut calcique des patients sans hypoalbuminémie et des patients hypercalcémiques [“Corrected” calcium: calcium status underestimation in non-hypoalbuminemic patients and in hypercalcemic patients]. Ann Biol Clin (Paris). 2009 Jul-Aug;67(4):411-8. French. doi: 10.1684/abc.2009.0348. PMID: 19654080.
About the Creator
Dr. Xavier Parent, MD
Biochemist, France
