Pediatrics medical calculators
Neonatal and pediatric medical calculators.
Pediatric calculators emphasize weight-based dosing, airway sizing, and age-adjusted renal function. Weight estimation, ETT size, mg/kg dosing, maintenance fluids, Schwartz eGFR, and corrected age tools are included with explicit notes on when measured weight or length must be used instead of formulas.
13 calculators
Absolute Neutrophil Count (ANC)
ANCCompute absolute neutrophil count from WBC and neutrophil/band percentages or fractions.
Allowable Blood Loss & EBV
ABL / EBVEstimate blood volume by age group and calculate allowable blood loss before a target hematocrit.
Apgar Score Calculator
ApgarCompute the 1- and 5-minute Apgar score from appearance, pulse, grimace, activity, and respiration.
Body Surface Area (BSA)
BSACalculate body surface area with Mosteller, DuBois & DuBois, Haycock, or Gehan & George formulas. Compare all methods side by side.
Centor / McIsaac Strep Score
CentorEstimate group A strep pharyngitis probability with the modified Centor (McIsaac) score.
Corrected Age (Preterm)
Corrected AgeCalculate corrected (adjusted) age for preterm infants used in growth and developmental assessment.
Corrected Reticulocyte Count
Corrected ReticCorrect the reticulocyte percentage for anemia severity using hematocrit.
Infusion Rate (mL/h)
Infusion RateConvert mcg/kg/min or mg/kg/h infusions and bag concentration into mL/h pump rates.
Maintenance Fluids (4-2-1)
Maintenance FluidsEstimate hourly and daily maintenance IV fluid rates with the Holiday–Segar / 4-2-1 rule.
mg/kg Dose Calculator
mg/kgConvert a mg/kg dose and patient weight into a total milligram dose and optional volume.
Pediatric ETT Size
Peds ETTEstimate pediatric endotracheal tube internal diameter and approximate oral insertion depth from age.
Pediatric Weight Estimation
Peds WeightEstimate pediatric weight from age using APLS, Luscombe & Owens, and Best Guess formulas — plus infant and neonate modes.
Schwartz Pediatric eGFR
Schwartz eGFREstimate pediatric GFR with the Schwartz bedside equation (k × height / creatinine).