Body Surface Area (BSA)
Used for chemotherapy & drug dosing
Formula (Mosteller):
BSA (m²) = √[(Height × Weight) ÷ 3600]
BSA (m²) = √[(Height × Weight) ÷ 3600]
Creatinine Clearance (CrCl)
For renal dose adjustment
Formula:
CrCl = [(140 − age) × weight] ÷ (72 × SCr)
× 0.85 (if female)
CrCl = [(140 − age) × weight] ÷ (72 × SCr)
× 0.85 (if female)
eGFR (CKD-EPI)
Kidney function estimation
Formula:
CKD-EPI 2021 creatinine equation (non-race)
CKD-EPI 2021 creatinine equation (non-race)
Ideal Body Weight (IBW)
Pharmacy & anesthesia use
Formula (Devine):
Male: 50 + 2.3 × (inches − 60)
Female: 45.5 + 2.3 × (inches − 60)
Male: 50 + 2.3 × (inches − 60)
Female: 45.5 + 2.3 × (inches − 60)
Pediatric Dose Calculator
mg/kg with mg → mL conversion
Formulas:
Total dose (mg) = Weight × mg/kg
Volume (mL) = Dose (mg) ÷ Concentration (mg/mL)
Total dose (mg) = Weight × mg/kg
Volume (mL) = Dose (mg) ÷ Concentration (mg/mL)
IV Drip Rate Calculator
For macrodrip & microdrip sets
Formula:
Drip rate = (Volume × Drop factor) ÷ Time
Note: Drop factor depends on IV set:
10–20 gtt/mL (macrodrip), 60 gtt/mL (microdrip)
Drip rate = (Volume × Drop factor) ÷ Time
Note: Drop factor depends on IV set:
10–20 gtt/mL (macrodrip), 60 gtt/mL (microdrip)
Disclaimer: These calculators are intended for educational and clinical support purposes only.
They do not replace professional medical judgment. Always verify calculations and
consult qualified healthcare professionals before applying results to patient care.