Blood test interpretation, hemoglobin A1c, lipid panels, and renal function calculators. Browse our free lab values tools below — all calculators are instant, accurate, and require no sign-up.
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.
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.
Albumin/Globulin Ratio Calculator — Calculate the A/G ratio from serum albumin and globulin or total protein values. Includes interpretation guide and associated conditions.
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.
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.
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 hCG Pregnancy Test Interpreter — Review quantitative blood hCG trends with doubling time calculation, discriminatory-zone context, and gestational-age reference ranges.
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.
Blood Volume Calculator — Estimate total blood volume using Nadler, Allen, and simple mL/kg methods. Includes RBC and plasma volume calculation with hematocrit.
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.
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.
Newborn Hyperbilirubinemia Assessment Calculator — Review neonatal jaundice context using Bhutani nomogram zones, simplified AAP 2022 reference thresholds, bilirubin rise, and direct-bilirubin fraction.
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.
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 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.
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.
Serum Osmolality Calculator — Calculate serum osmolality, effective osmolality (tonicity), osmol gap, corrected sodium, and a rough free-water estimate in one interpretation worksheet.
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.
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.
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.
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.