Age-Adjusted D-Dimer Calculator
Calculate age-adjusted D-dimer thresholds for patients over 50 and compare common FEU and DDU units in the standard VTE rule-out pathway.
Free Lab Values Calculators
24 toolsBlood test interpretation, hemoglobin A1c, lipid panels, and renal function calculators. Browse our free lab values tools below — no sign-up required.
Albumin/Globulin Ratio Calculator
Calculate the A/G ratio from serum albumin and globulin or total protein values. Includes interpretation guide and associated conditions.
Arterial Blood Gas (ABG) Interpreter
Review arterial blood gas values including pH, PaCO₂, HCO₃⁻, base excess, anion gap, and compensation patterns for acid-base interpretation.
Blood Donation Eligibility & Volume Calculator
Check blood donation eligibility, estimate donation volume as a percentage of blood volume, and compare donation types with recovery intervals.
Blood hCG Pregnancy Test Interpreter
Review quantitative blood hCG trends with doubling time calculation, discriminatory-zone context, and gestational-age reference ranges.
Blood Type Compatibility & Inheritance Calculator
Determine blood type compatibility for transfusion, calculate possible child blood types from parental genetics, and view population frequency data.
Blood Volume Calculator
Estimate total blood volume using Nadler, Allen, and simple mL/kg methods. Includes RBC and plasma volume calculation with hematocrit.
BUN/Creatinine Ratio Calculator
Calculate the BUN/Creatinine ratio to differentiate prerenal, intrinsic renal, and postrenal causes of kidney dysfunction. Includes eGFR and differential diagnosis.
Estimated Average Glucose (eAG) Calculator
Convert HbA1c to estimated average glucose (eAG) in mg/dL or mmol/L, or reverse-calculate HbA1c from average glucose with broad diabetes threshold context.
Estimated Blood Loss Calculator
Calculate estimated blood loss from hematocrit changes using the Gross formula, with ATLS hemorrhage-class reference context and replacement-volume equivalents.
Hemoglobin A1c Calculator
Convert HbA1c between NGSP (%) and IFCC (mmol/mol), estimate average glucose, and review broad diabetes threshold context.
INR Calculator
Calculate International Normalized Ratio from PT and ISI, then compare the result with common therapeutic ranges in one anticoagulation reference worksheet.
Iron Deficiency Calculator
Review ferritin, serum iron, TIBC, transferrin saturation, and hemoglobin in one worksheet, with a rough Ganzoni iron-deficit estimate and inflammation context when CRP is available.
LDL Cholesterol Calculator
Calculate LDL cholesterol with Friedewald and Martin-Hopkins equations, then compare it with non-HDL cholesterol and common lipid ratios in one worksheet.
Newborn Hyperbilirubinemia Assessment Calculator
Review neonatal jaundice context using Bhutani nomogram zones, simplified AAP reference thresholds, bilirubin rise, and direct-bilirubin fraction.
Pediatric Blood Volume Calculator
Estimate blood volume in children by age group and weight, calculate maximum allowable blood loss (MABL), pRBC transfusion volumes, and pediatric hemorrhage classification.
Plasma Osmolality Calculator
Calculate plasma osmolality, effective osmolality (tonicity), osmol gap, corrected sodium for hyperglycemia, and a simple free-water estimate.
PSA Density Calculator
Calculate PSA density from total PSA and prostate volume, review free/total PSA ratio, and compare the result with age-specific and simple BPH-context reference ranges.
PSA Doubling Time Calculator
Calculate PSA doubling time (PSADT) and velocity from serial PSA values, then review the trend with a cautious kinetic context and illustrative future projections.
RBC Indices Calculator
Calculate MCV, MCH, and MCHC from CBC values, classify anemia as microcytic/normocytic/macrocytic, compute Mentzer index for thalassemia screening, and assess reticulocyte production index.
Serum Osmolality Calculator
Calculate serum osmolality, effective osmolality (tonicity), osmol gap, corrected sodium, and a rough free-water estimate in one interpretation worksheet.
Transferrin & Iron Panel Calculator
Calculate TSAT, UIBC, and TIBC from transferrin and serum iron, then review the iron-panel pattern alongside ferritin and CRP context.
Venous Blood Gas (VBG) Calculator
Review venous blood gas pH, pCO₂, and HCO₃⁻, calculate anion gap with albumin correction, assess compensation, and estimate arterial values from venous samples.
VLDL Cholesterol Calculator
Estimate VLDL cholesterol from triglycerides or the full lipid panel, then compare it with non-HDL cholesterol, remnant cholesterol, and common lipid ratios.