Laboratory
8 calculators
Laboratory value interpretation tools for electrolyte disorders, lipid panels, and renal tubular function.
Related Specialties
Corrected Calcium
Calculates corrected total serum calcium adjusted for hypoalbuminemia. In hypoalbuminemia, measured total calcium is falsely low because less calcium is protein-bound; this correction estimates the physiologically active total calcium.
Internal MedicineTotal Cholesterol / HDL Ratio (TC/HDL)
Calculates the total cholesterol to HDL ratio (TC/HDL), a lipid-based cardiovascular risk indicator that compares total cholesterol with the protective HDL fraction.
Internal MedicineAtherogenic Index of Plasma (AIP)
Calculates the atherogenic index of plasma (AIP), a logarithmically transformed ratio of triglycerides to HDL cholesterol that reflects the balance of atherogenic and protective lipoproteins.
Internal MedicineApoB / ApoA1 Ratio (ApoB:ApoA1)
Calculates the apolipoprotein B to apolipoprotein A1 ratio (ApoB:ApoA1), an index of the balance between atherogenic (ApoB) and anti-atherogenic (ApoA1) lipoproteins used in cardiovascular risk assessment.
Internal MedicineCalculated LDL (Friedewald Equation)
Estimates low-density lipoprotein cholesterol (LDL-C) from a standard fasting lipid panel using the Friedewald equation: LDL = total cholesterol − HDL − (triglycerides / 5). Used for cardiovascular risk assessment and lipid-lowering treatment targets. Not valid when triglycerides are ≥ 400 mg/dL.
Internal MedicineNon-HDL Cholesterol
Calculates non-HDL cholesterol (total cholesterol minus HDL cholesterol). Non-HDL captures all atherogenic apolipoprotein B-containing lipoproteins, including LDL, VLDL, IDL, and remnants, and is a secondary lipid treatment target per ATP III guidelines.
Internal MedicineAlbumin to Globulin Ratio (A/G)
Calculates the albumin to globulin ratio from serum albumin and total protein (A/G ratio = albumin / (total protein − albumin)). The ratio is used as a screening aid in the evaluation of liver disease, nephrotic syndrome, and monoclonal gammopathies, alongside the absolute albumin and globulin values.
Internal MedicineCorrected Magnesium (Albumin-Adjusted)
Adjusts measured serum magnesium for hypoalbuminemia. When serum albumin is low, measured total magnesium is falsely reduced because less magnesium is bound to proteins. This correction estimates the physiologically relevant magnesium level.
Internal Medicine