Home › Biomarkers › Corrected calcium
Of 200 blood samples a lab received for a liver test, 24.5% had low calcium and 3% had raised calcium. That was before any correction for albumin.[1]
On this page you can read what corrected calcium is, what the guidelines say about a value that is too low or too high, what affects your value and which values are best to look at alongside it.
Also known as: adjusted calcium, albumin-corrected calcium. At the lab: n/a.
Calcium in your blood is closely linked to albumin, a protein in your blood. That is why your calcium value is adjusted for your albumin. This adjusted value is called corrected calcium.[1]
Payne and colleagues created a simple formula for it: corrected calcium is calcium minus albumin plus 4.0. Calcium is then given in mg/100 ml and albumin in g/100 ml.[1]
A correction for albumin worked better than a correction for total protein or for specific gravity. In 39 samples with high levels of gamma globulins, the correction for albumin gave normal calcium values.[1]
Calcium was more closely linked to albumin (r = 0.867) than to total protein (r = 0.682). So albumin tells you a lot about your calcium value.[1]
After the correction, the 95% limits of the measured values matched the 95% limits of the normal range in that lab.[1]
An international group of more than 50 experts wrote a guideline on the assessment and management of an overactive parathyroid gland.[2]
The advice on the kidneys has been revised in that guideline.[2]
| Value | What it can indicate | Who it is for |
|---|---|---|
| Low calcium, not corrected[1] | Found in 49 of the 200 samples (24.5%); may be linked to abnormal protein values in the blood | Blood samples for a liver test in one lab |
| Raised calcium, not corrected[1] | Found in six of the 200 samples (3%) | Blood samples for a liver test in one lab |
| Calcium corrected for albumin[1] | The 95% limits of the measured values matched the 95% limits of the normal range | Blood samples for a liver test in one lab |
| Calcium corrected for albumin with high levels of gamma globulins[1] | Gave normal calcium values, unlike a correction for total protein | 39 samples with a raised level of gamma globulins |
Source: Payne and colleagues, British Medical Journal. The study covers blood samples taken for a liver test in one laboratory.[1]
In Payne's study, a small share of the samples had a raised calcium: six of the 200. An international guideline describes how doctors assess and manage an overactive parathyroid gland. If your value is high, discuss it with your doctor.[1, 2]
Without correction, 24.5% of the samples had low calcium. Low calcium without correction can point to low albumin in your blood. That is why your doctor looks at the corrected value.[1]
BioProfile is working on its own zones for each value, from risk to optimal. A doctor reviews those zones before they appear in your result.
Calcium in your blood is closely linked to albumin. The correction takes into account how much albumin you have.[1]
With high levels of gamma globulins, a correction for total protein did not give an accurate picture. A correction for albumin did give normal calcium values.[1]
In blood taken for a liver test, researchers saw a wide spread of abnormal protein values.[1]
Corrected calcium is included in BioProfile 77, 87, 121 and 150.[3]
The BioProfile editorial team wrote this page on 10 October 2026 from the sources below, which we read on 10 October 2026. Every number on this page appears in one of those sources, with that source's number next to it. An expert has yet to check this page; after that check, the expert's name and the date of the check will appear at the top. This page offers explanation, not a diagnosis. Discuss a value outside the range with your GP.
