GENERAL CALCULATORS
A versatile set of tools to assist healthcare professionals with quick and accurate calculations across various medical specialties.
20 calculators
Calculators in this category
BSA Du Bois
Body Surface Area using Du Bois formula.
BSA Mosteller
Body Surface Area using Mosteller formula.
Ideal Body Weight (Male)
Estimated ideal body weight for adult males (Devine formula).
Ideal Body Weight (Female)
Estimated ideal body weight for adult females (Devine formula).
Creatinine Clearance (Cockcroft-Gault)
Estimated creatinine clearance for drug dosing.
GFR (MDRD 4-variable)
Estimated GFR using MDRD 4-variable equation.
Corrected Calcium
Serum calcium corrected for albumin.
Anion Gap
Serum anion gap: Na - (Cl + HCO3).
BMI and BSA Combined
BMI plus BSA (Mosteller) in one calculator.
Weight-Based Drug Dose
Dose = dose_per_kg × weight (kg).
BSA-Based Drug Dose
Dose = BSA (m²) × dose per m².
Fluid Deficit (4-2-1 rule)
Hourly maintenance fluid (mL/h) by 4-2-1 rule.
Mean Arterial Pressure
MAP ≈ (2×DBP + SBP)/3.
Osmolarity (Serum)
Calculated serum osmolality: 2×Na + Glu/18 + BUN/2.8.
Target HR (Karvonen)
Target heart rate by % of HR reserve (Karvonen).
FEV1 % Predicted
FEV1 as % of predicted (simplified: uses age, height).
Heart Rate Max (Age-Predicted)
Estimated max HR: 220 - age (simple formula).
Liquid Dose (mg to mL)
Convert dose in mg to volume (mL) using concentration.
BMI Category
BMI and WHO weight category from weight and height.
Lean Body Weight (James)
Estimated lean body weight (James formula).
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