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 to improve specificity in VTE evaluation. Includes post-test probability.
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.
Arterial Blood Gas (ABG) Interpreter — Interpret arterial blood gas results including pH, PaCO2, HCO3, base excess, anion gap, and delta-delta ratio for acid-base disorders.
Blood hCG Pregnancy Test Interpreter — Interpret quantitative blood hCG levels with doubling time calculation, discriminatory zone assessment, and gestational age correlation.
Estimated Blood Loss Calculator — Calculate estimated blood loss from hematocrit changes using the Gross formula. Includes ATLS hemorrhage classification and fluid replacement guidance.
Blood Volume Calculator — Estimate total blood volume using Nadler, Allen, and simple mL/kg methods. Includes RBC and plasma volume calculation with hematocrit.
Blood Type Compatibility & Inheritance Calculator — Determine blood type compatibility for transfusion, calculate possible child blood types from parental genetics, and view population frequency data.
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 A1c from average glucose. Includes ADA diabetes thresholds.
INR Calculator — Calculate International Normalized Ratio from PT and ISI, assess warfarin therapeutic range, and get dose adjustment guidance by indication.
Hemoglobin A1c Calculator — Convert HbA1c between NGSP (%) and IFCC (mmol/mol), estimate average glucose, assess diabetes risk, and determine glycemic control targets.
LDL Cholesterol Calculator — Calculate LDL cholesterol using Friedewald and Martin-Hopkins formulas, evaluate non-HDL-C, TC:HDL ratio, TG:HDL ratio, remnant cholesterol, and assess cardiovascular risk by ATP III guidelines.
Iron Deficiency Calculator — Evaluate iron studies (ferritin, serum iron, TIBC, transferrin saturation), stage iron depletion, differentiate IDA from anemia of chronic disease, and calculate iron deficit with the Ganzoni formula.
Newborn Hyperbilirubinemia Assessment Calculator — Assess neonatal jaundice risk using Bhutani nomogram zones, AAP 2022 phototherapy thresholds, rate of bilirubin rise, and exchange transfusion thresholds adjusted for gestational age and risk factors.
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 free water deficit. Includes osmol gap differential diagnosis for toxic alcohol eval...
PSA Density Calculator — Calculate PSA density from total PSA and prostate volume, assess prostate cancer risk, compute free/total PSA ratio, and compare with age-specific and BPH-expected PSA levels.
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.
PSA Doubling Time Calculator — Calculate PSA doubling time (PSADT) and velocity from serial PSA values, assess recurrence risk after prostatectomy or radiation, and project future PSA levels.
Transferrin & Iron Panel Calculator — Calculate TSAT, UIBC, and TIBC from transferrin and serum iron, classify iron panel patterns for IDA vs ACD, compute Ganzoni iron deficit, and adjust ferritin for inflammation.
Serum Osmolality Calculator — Calculate serum osmolality, effective osmolality (tonicity), osmol gap, corrected sodium, and free water deficit with full differential diagnosis for hyponatremia and toxic alcohol ingestion.
Venous Blood Gas (VBG) Calculator — Interpret venous blood gas pH, pCO₂, and HCO₃⁻, calculate anion gap with albumin correction, delta-delta ratio, Winter's compensation, and estimate arterial values from venous samples.
VLDL Cholesterol Calculator — Calculate VLDL cholesterol using Friedewald and Martin-Hopkins methods, compute non-HDL-C, remnant cholesterol, TG/HDL ratio for insulin resistance, and stratify triglyceride-related cardiovascular...