Medical calculators and tools for general health, nutrition, and wellness. Useful for daily practice by doctors, students, and healthcare professionals.
Medical Calculator – SonDoctor.com × Hypertonic Saline Preparation Calculator (Making 3% Saline) This calculator helps determine the final NaCl concentration when mixing two saline solutions. Especially useful for preparing 3% saline for hyponatremia correction. Solution A: [e.g., Normal Saline] NaCl Concentration (%): Volume (mL): * Normal saline is 0.9% NaCl solution Solution B: [e.g., Hypertonic … Read more
Medical Calculator – SonDoctor.com × GCS (Glasgow Coma Scale) Calculator The score is automatically calculated as you select each item. (1) Eye opening response Eyes open spontaneously (4 points) Eye opening to verbal command (3 points) Eye opening to pain (2 points) No eye opening (1 point) (2) Verbal response Oriented to time, person, place … Read more
Medical Calculator – SonDoctor.com × Unit Conversion Calculator (mmol/L ↔ mg/dL) mmol/L → mg/dL mg/dL → mmol/L Molar Mass (g/mol): Select Molar MassEnter ManuallyBUNBicarbonate (HCO₃⁻)CreatinineCalcium (Ca)Chloride (Cl)Cholesterol (TC, LDL‑C, HDL‑C)GlucosePotassium (K)Sodium (Na)Triglycerides (TG)─────────────────────3-β-hydroxybutyrateAcetoacetateAcetoneAlanineAmmonia (NH₃)Arsenic (As)Ascorbic acid (Vitamin C)BilirubinCreatineCystineCaffeineCarnitineCitrullineCopper (Cu²⁺)DopamineFluoride (F⁻)Folate (Folic Acid)GABA (Gamma‑aminobutyric acid)Glutamate (Glutamic acid)GlutamineHistidineUric acidLithium (Li⁺)Magnesium (Mg²⁺)Manganese (Mn)Mercury (Hg)MethionineMyo‑InositolNiacin (Vitamin B3)Iodide (I⁻)IsoleucineLeucineLead (Pb)CitrullineOrnithinePhenylalanineLactateHomocysteineHypoxanthinePyruvateRiboflavin … Read more
Medical Calculator – SonDoctor.com × Real-Time IV Drip Rate Calculator Click the button every time a fluid drop falls. This tool calculates IV drip rate in real-time (gtt/min and mL/hr) using drop intervals and a customizable drop factor. Drop Factor (gtt/mL) : * If the drop factor is 20 gtt/mL, it means 20 drops equal … Read more
Medical Calculator – SonDoctor.com × Body Fluid Compartment Calculator TBW (Total body water) = Body weight × 60% TBW = ECF + ICF ECF (Extracellular fluid) = TBW × 1/3 = Body weight × 20% ICF (Intracellular fluid) = TBW × 2/3 = Body weight × 40% ECF = Plasma + Interstitial fluid Plasma = … Read more
Medical Calculator – SonDoctor.com × Heparin Dilution Calculator for Dialysis Final Heparin Concentration [U/mL] = ( Heparin Ampule Concentration [U/mL] × Heparin Volume [mL] ) / Final Total Volume [mL] Choose Heparin Ampule Concentration 20,000 U / 20 mL (1,000 U/mL = 1:1,000) 25,000 U / 5 mL (5,000 U/mL = 1:5,000) 1,000 U / … Read more
Medical Calculator – SonDoctor.com × Insensible Water Loss Calculator (Under 15 years) Insensible loss [mL] = (30 – Age) × Weight [kg] + 200 × (Body Temp [℃] – 36.8) (15 years and older) Insensible loss [mL] = 15 × Weight [kg] + 200 × (Body Temp [℃] – 36.8) ※ Respiratory loss : Skin … Read more
Medical Calculator – SonDoctor.com × BMI (Body Mass Index) Calculator Calculate BMI using height and weight Target weight for a specific BMI Height (cm): Weight (kg): Target BMI (kg/㎡) : BMI (kg/m²) Korean Standard WHO Global Standard < 18.5 Underweight Underweight 18.5 – 22.9 Normal weight Normal weight 23.0 – 24.9 Overweight Normal weight 25.0 … Read more
Medical Calculator – SonDoctor.com × Total body water (TBW) Calculator Watson Formula: TBW(Male) = 2.447 – (0.09516 × G) + (0.1074 × H) + (0.3362 × W) TBW(Female) = -2.097 + (0.1069 × H) + (0.2466 × W) Hume-Weyers Formula: TBW(Male) = (0.194786 × W) + (0.296785 × H) – 14.012934 TBW(Female) = (0.344547 × … Read more
Medical Calculator – SonDoctor.com × Gatt (Drop Rate) Calculator (mL/hr ↔ gtt/min) mL/hr → gtt/min gtt/min → ml/hr Infusion rate to convert (mL/hr): Infusion rate to convert (gtt/min): Drop Factor (gtt/mL): * A drop factor of 20 gtt/mL means 20 drops equal 1 mL. Check the IV set packaging. Listen to Drip Rate :