Clinical Laboratory Calculators
Practical calculators for laboratory medicine, clinical diagnostics, hematology, biochemistry, renal function, liver disease, endocrinology, oncology and more.
Clinical laboratory medicine involves hundreds of formulas, indices and derived parameters. LabDecoded brings these calculations together in one practical, easy-to-use collection for healthcare professionals, laboratory scientists, students, researchers and educators.
Each calculator is designed to make the calculation process transparent by presenting the required inputs, formula, calculated result and relevant interpretation or limitations.
Explore Clinical Laboratory Calculators
Choose a calculator according to the laboratory parameter or clinical application.
Renal & Kidney Function
Calculators for estimating kidney function, renal clearance, osmolality, electrolyte balance, protein excretion and related renal parameters.
eGFR CKD-EPI 2021 Calculator
Estimate GFR using the CKD-EPI 2021 creatinine equation.
Open Calculator →eGFR CKD-EPI 2009 Calculator
Estimate glomerular filtration rate using the original CKD-EPI creatinine equation.
Open Calculator →Creatinine Clearance Calculator
Estimate creatinine clearance using the Cockcroft-Gault equation.
Open Calculator →24-Hour Urine Creatinine Calculator
Calculate daily urinary creatinine excretion from timed urine collection data.
Open Calculator →Creatinine Clearance from Urine Calculator
Calculate measured creatinine clearance using serum creatinine and timed urine collection data.
Open Calculator →Serum Osmolality Calculator
Calculate estimated serum osmolality from commonly available biochemical measurements.
Open Calculator →Urine Osmolality Calculator
Estimate urine osmolality for assessment of water balance and renal concentrating ability.
Open Calculator →Osmolal Gap Calculator
Calculate the difference between measured and calculated serum osmolality.
Open Calculator →BUN / Creatinine Ratio
Calculate the BUN-to-creatinine ratio from routine renal chemistry results.
Open Calculator →Corrected Sodium Calculator
Estimate corrected serum sodium in patients with hyperglycemia.
Open Calculator →Fractional Excretion of Sodium (FENa)
Calculate fractional sodium excretion using urine and serum sodium and creatinine values.
Open Calculator →Fractional Excretion of Urea (FEUrea)
Calculate fractional urea excretion as an aid in evaluating renal sodium and water handling.
Open Calculator →Transtubular Potassium Gradient (TTKG)
Estimate the transtubular potassium gradient to assess renal potassium handling.
Open Calculator →Anion Gap Calculator
Calculate the serum anion gap for evaluation of metabolic acid-base disorders.
Open Calculator →Anion Gap with Albumin Correction
Calculate the albumin-corrected anion gap in patients with hypoalbuminemia.
Open Calculator →Urine Protein-to-Creatinine Ratio
Estimate daily urinary protein excretion from a spot urine protein-to-creatinine ratio.
Open Calculator →Urine Albumin-to-Creatinine Ratio
Calculate urinary albumin-to-creatinine ratio for assessment of albuminuria.
Open Calculator →Fractional Excretion Calculator
Calculate fractional excretion of selected electrolytes using serum and urine measurements.
Open Calculator →Fractional Excretion of Calcium
Calculate fractional calcium excretion using paired serum and urine measurements.
Open Calculator →Fractional Excretion of Potassium
Estimate renal potassium excretion using serum and urine potassium and creatinine values.
Open Calculator →BUN to Urea Conversion Calculator
Convert between blood urea nitrogen and serum urea concentrations.
Open Calculator →Urine Sodium Excretion Calculator
Estimate urinary sodium excretion from timed urine collection measurements.
Open Calculator →Urine Potassium Excretion Calculator
Estimate urinary potassium excretion from timed urine collection data.
Open Calculator →Hematology Calculators
Red cell indices, anemia screening, leukocyte indices, platelet-related calculations and inflammatory indices.
Mentzer Index Calculator
Calculate the Mentzer Index using MCV and RBC count as a screening index in microcytic anemia.
Open Calculator →Absolute Neutrophil Count Calculator
Calculate ANC from total leukocyte count and neutrophil differential.
Open Calculator →Reticulocyte Production Index
Assess the adequacy of erythropoietic response in anemia.
Open Calculator →Corrected Reticulocyte Count
Correct the reticulocyte percentage according to hematocrit.
Open Calculator →RBC Indices Calculator
Calculate MCV, MCH, MCHC and other common red cell indices.
Open Calculator →RDW Index Calculator
Calculate RDW-based indices used in evaluation of microcytosis.
Open Calculator →Shine & Lal Index
Calculate the Shine and Lal Index as an additional screening approach for microcytosis.
Open Calculator →Green & King Index
Calculate the Green and King Index using hematology parameters.
Open Calculator →England & Fraser Index
Calculate the England and Fraser discriminant function for microcytic anemia.
Open Calculator →Neutrophil-to-Lymphocyte Ratio
Calculate NLR from neutrophil and lymphocyte counts.
Open Calculator →Systemic Immune-Inflammation Index
Calculate SII using platelet, neutrophil and lymphocyte counts.
Open Calculator →Monocyte-to-Lymphocyte Ratio
Calculate MLR from routine differential leukocyte results.
Open Calculator →Absolute Eosinophil Count
Calculate absolute eosinophil count from WBC and eosinophil percentage.
Open Calculator →Liver & Fibrosis Calculators
Non-invasive liver fibrosis indices and liver-related laboratory calculations.
APRI Score Calculator
Calculate the AST-to-Platelet Ratio Index for non-invasive fibrosis assessment.
Open Calculator →AST / ALT Ratio Calculator
Calculate the AST-to-ALT ratio for use alongside clinical assessment.
Open Calculator →Albumin / Globulin Ratio
Calculate the A/G ratio from serum albumin and globulin concentrations.
Open Calculator →Lipid & Cardiovascular Calculators
Calculations for lipid profile interpretation and cardiovascular laboratory assessment.
LDL Cholesterol Calculator
Estimate LDL cholesterol using an appropriate validated lipid equation.
Open Calculator →Martin-Hopkins LDL Calculator
Estimate LDL cholesterol using the Martin-Hopkins approach when applicable.
Open Calculator →Non-HDL Cholesterol Calculator
Calculate non-HDL cholesterol from total cholesterol and HDL cholesterol.
Open Calculator →Total Cholesterol / HDL Ratio
Calculate the total cholesterol-to-HDL cholesterol ratio.
Open Calculator →Metabolic & Endocrine Calculators
Glucose metabolism, insulin resistance, obesity and endocrine-related calculations.
HOMA-IR Calculator
Estimate insulin resistance from fasting glucose and fasting insulin.
Open Calculator →HOMA-B Calculator
Estimate beta-cell function using fasting glucose and insulin measurements.
Open Calculator →HbA1c to eAG Calculator
Convert HbA1c into estimated average glucose using an established relationship.
Open Calculator →Body Mass Index Calculator
Calculate BMI from height and weight and display the corresponding category.
Open Calculator →Anion Gap Calculator
Calculate the serum anion gap for evaluation of acid-base disorders.
Open Calculator →Corrected Sodium Calculator
Estimate corrected sodium in the presence of hyperglycemia.
Open Calculator →Reproductive & Hormonal Calculators
Laboratory calculations involving reproductive hormones and ovarian malignancy risk assessment.
ROMA Index Calculator
Calculate the Risk of Ovarian Malignancy Algorithm using CA-125, HE4 and menopausal status.
Open Calculator →Free Androgen Index Calculator
Calculate FAI from total testosterone and SHBG after ensuring compatible molar units.
Open Calculator →Testosterone / SHBG Calculator
Explore calculated androgen-related parameters from testosterone and SHBG measurements.
Open Calculator →Oncology & Cancer Biomarker Calculators
Laboratory-derived indices and selected risk assessment tools relevant to oncology and cancer care.
ROMA Index Calculator
Calculate the Risk of Ovarian Malignancy Algorithm using CA-125, HE4 and menopausal status.
Open Calculator →NLR Calculator
Calculate the neutrophil-to-lymphocyte ratio, a commonly studied inflammatory index in oncology.
Open Calculator →PLR Calculator
Calculate the platelet-to-lymphocyte ratio, a laboratory-derived inflammatory index.
Open Calculator →Systemic Immune-Inflammation Index
Calculate SII from platelet, neutrophil and lymphocyte counts.
Open Calculator →Absolute Lymphocyte Count Calculator
Calculate absolute lymphocyte count from total leukocyte count and lymphocyte percentage.
Open Calculator →Corrected Calcium Calculator
Calculate albumin-adjusted calcium, which may be relevant when evaluating patients with malignancy.
Open Calculator →Albumin / Globulin Ratio
Calculate A/G ratio from serum albumin and calculated or measured globulin.
Open Calculator →LDH-Based Laboratory Assessment
Explore selected calculations involving LDH and related laboratory parameters.
Open Calculator →Electrolytes & Acid–Base Calculators
Common calculations used for interpretation of electrolytes, osmolality and acid-base disorders.
Anion Gap Calculator
Calculate serum anion gap from sodium, chloride and bicarbonate.
Open Calculator →Serum Osmolality Calculator
Estimate calculated serum osmolality from sodium, glucose and urea or BUN.
Open Calculator →Pregnancy & Maternal Screening
Gestational age, pregnancy dating and selected maternal screening calculations.
Gestational Age Calculator
Estimate gestational age using LMP and selected ultrasound parameters.
Open Calculator →Estimated Due Date Calculator
Estimate EDD using appropriate pregnancy dating information.
Open Calculator →CRL-Based Pregnancy Dating
Estimate gestational age using crown-rump length according to an appropriate reference.
Open Calculator →Inflammation & Immune Indices
Derived hematological indices used in research, inflammatory assessment and clinical studies.
Neutrophil-to-Lymphocyte Ratio
Calculate NLR from neutrophil and lymphocyte counts.
Open Calculator →Systemic Immune-Inflammation Index
Calculate SII from platelet, neutrophil and lymphocyte counts.
Open Calculator →Understanding the Calculation
LabDecoded calculators show the underlying equation so users can understand how laboratory measurements are transformed into calculated indices.
Mentzer Index
A commonly used screening index for microcytic anemia patterns.
FIB-4 Index
Combines age, AST, ALT and platelet count to estimate the likelihood of advanced fibrosis.
HOMA-IR
A mathematical model using fasting glucose and fasting insulin to estimate insulin resistance.
Free Androgen Index
A calculated ratio involving total testosterone and SHBG concentrations.
Neutrophil-to-Lymphocyte Ratio
A simple differential leukocyte-derived index.
Systemic Immune-Inflammation Index
Combines platelet, neutrophil and lymphocyte counts into a composite index.
Why Use LabDecoded?
Laboratory Focused
Designed specifically around laboratory medicine and diagnostic calculations.
Fast Calculations
Enter the required values and obtain the calculated result within seconds.
Transparent Formulae
Understand the equation rather than receiving only a final numerical result.
Educational
Useful for laboratory professionals, physicians, students, researchers and educators.
Clinical Calculator Categories
| Category | Examples | Application |
|---|---|---|
| Renal | eGFR, Creatinine Clearance, Osmolality | Kidney function assessment |
| Hematology | Mentzer, ANC, RPI, RBC Indices | Blood cell and anemia assessment |
| Liver | FIB-4, APRI, AST/ALT | Fibrosis and liver assessment |
| Lipid | LDL-C, Non-HDL-C, LDL equations | Lipid profile interpretation |
| Metabolic | HOMA-IR, HOMA-B, HbA1c-eAG | Glucose and metabolic assessment |
| Endocrine | FAI, HOMA calculations | Hormonal and metabolic assessment |
| Oncology | ROMA, NLR, PLR, SII | Cancer-related laboratory indices |
| Electrolytes | Anion Gap, Corrected Calcium, Osmolality | Electrolyte and acid-base assessment |
| Pregnancy | Gestational Age, EDD, CRL | Pregnancy dating and screening |
| Inflammation | NLR, PLR, SII, MLR | Inflammatory and immune indices |
How to Use a LabDecoded Calculator
Select
Select the calculator that matches your laboratory or clinical question.
Enter Values
Enter the required laboratory and patient information.
Check Units
Confirm that the laboratory values are entered in the correct units.
Calculate
The calculator applies the selected equation automatically.
Interpret
Review the result together with clinical context and applicable limitations.
Who Can Use Clinical Laboratory Calculators?
Clinical Laboratories
Useful for laboratory professionals performing routine and specialized calculations.
Physicians & Pathologists
Provides rapid access to commonly used laboratory-derived indices.
Medical Students
Helps connect laboratory parameters with clinical equations and diagnostic concepts.
Researchers & Educators
Useful for teaching, research and understanding laboratory-derived clinical indices.
Frequently Asked Questions
What are clinical laboratory calculators?
They are digital tools that apply established mathematical equations to laboratory measurements and patient characteristics to produce calculated indices or estimates.
Are these calculators diagnostic tests?
No. A calculated index generally provides an estimate, screening parameter or clinical reference value and should not automatically be considered a diagnosis.
Why can different calculators give different results?
Different equations may have different assumptions, populations, units, analytical methods and validation characteristics.
Should calculator results replace laboratory reference ranges?
No. Laboratory-specific reference intervals, validated clinical guidelines and the patient's clinical context remain important.
Are the calculators useful for students?
Yes. They can help students understand clinical chemistry, hematology, endocrinology, nephrology, oncology and laboratory medicine.
Can calculated indices be used for research?
They may be useful for research and educational purposes, provided the selected equation is appropriate for the study population and methodology.
Calculated values should be interpreted together with the patient's clinical history, examination, laboratory findings and other relevant diagnostic information.
Different equations may have different indications, assumptions, validation populations and limitations. Always verify the appropriate formula, units and current clinical guidance before applying a calculated result to patient care.
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