Volume of Distribution (Vd) Calculator Total Dose Administered mgµg Plasma Drug Concentration mg/Lµg/mL Patient Weight (optional, for L/kg) Calculate Reset Formula: Vd (L) = Dose (mg) / Concentration (mg/L) Vd per kg: Divide by patient weight in kg. Low Vd (<0.2 L/kg): Stays in plasma. ~0.6 L/kg: Total body water. >1 L/kg: Extensive tissue distribution. … Read more
Bioavailability Calculator Absolute Relative AUC (oral) AUC (IV) Dose (oral) mgµg Dose (IV) mgµg AUC (Test Formulation) AUC (Reference Formulation) Dose (Test) mgµg Dose (Reference) mgµg Calculate Reset Absolute Bioavailability: (AUCoral × DoseIV) / (AUCIV × Doseoral) × 100 Relative Bioavailability: (AUCtest × Doseref) / (AUCref × Dosetest) × 100 0%150% Export PNG Export PDF … Read more
Blood Osmolality Calculator Calculate blood (serum/plasma) osmolality (mOsm/kg), detect osmolar gap, and interpret results. All units auto-convert. Sodium (Na⁺) Glucose mg/dLmmol/L BUN (Blood Urea Nitrogen) mg/dLmmol/L Optional: Ethanol Optional: Measured Osmolality Calculate Reset Formula: (2 × Na⁺) + (Glucose ÷ 18) + (BUN ÷ 2.8) [+ (Ethanol ÷ 3.7)] Normal: 275–295 mOsm/kg | <275: hypoosmolar … Read more
Plasma Osmolality Calculator Calculate plasma osmolality (mOsm/kg), detect osmolar gap, and interpret results clinically. All unit conversions are automatic. Sodium (Na⁺) Glucose mg/dLmmol/L Blood Urea Nitrogen (BUN) mg/dLmmol/L Measured Osmolality (optional) Calculate Reset Formula: (2 × Na⁺) + (Glucose ÷ 18) + (BUN ÷ 2.8) Normal: 275–295 mOsm/kg | <275: hypoosmolar | >295: hyperosmolar Osmolar … Read more
About the Urine Osmolality Calculator The Urine Osmolality Calculator is a practical reference tool designed to help estimate, interpret, and compare urine osmolality values in a simple format. It can be used for learning, quick bedside-style review, and educational interpretation of urinary concentration status. Urine osmolality reflects how concentrated or dilute the urine is. It … Read more
Serum Osmolality Calculator Calculate serum osmolality and osmolar gap using sodium, glucose, and BUN. Supports all clinical units, breakdown, and instant clinical interpretation. Sodium (Na⁺) Glucose mg/dLmmol/L BUN (Blood Urea Nitrogen) mg/dLmmol/L Measured Osmolality (optional) Calculate Reset Formula: (2 × Na⁺) + (Glucose/18 or /1) + (BUN/2.8 or /0.357) Normal: 275–295 mOsm/kg | Gap >10: … Read more
Plasma Osmolality Calculator Calculate the estimated plasma osmolality from standard lab values to assess a patient’s fluid and electrolyte balance. Includes an optional osmolar gap calculation for advanced analysis. Patient Lab Values Sodium (Na⁺)iWhy double sodium?Sodium is the primary extracellular cation and is balanced by anions like chloride (Cl⁻) and bicarbonate (HCO₃⁻). Multiplying by 2 … Read more
Buffer Osmolarity Calculator Calculate the total osmolarity of a buffer solution by defining its components. Ideal for creating isotonic solutions for lab use or pharmaceutical formulations. Load a Standard Buffer System — Build a Custom Buffer —Acetate BufferPhosphate BufferCitrate BufferTris Buffer Buffer Components + Add Another Component Calculate Osmolarity Reset Buffer Analysis Total Estimated Osmolarity … Read more
TPN Osmolarity Calculator Estimate the final osmolarity of a Total Parenteral Nutrition (TPN) formulation to determine the appropriate route of administration (peripheral vs. central line) and ensure patient safety. Solution Volume Total Volume of TPN Solution mLL Macronutrients Dextrose ConcentrationiEach gram of anhydrous dextrose contributes approximately 5 mOsm. The calculator finds the total grams of … Read more
IV Fluid Osmolarity Calculator Calculate IV fluid osmolarity for any standard or custom solution, with component breakdown and clinical interpretation. IV Fluid Preset ? — Select or enter manually —0.9% NaCl (Normal Saline)0.45% NaCl (Half Normal)D5W (5% Dextrose)D10W (10% Dextrose)D5NS (5% Dextrose + 0.9% NaCl)3% NaClRinger’s Lactate Custom or Additional Solutes + Add Solute Calculate … Read more
