Weight-Based Dose Calculator (mg/kg & mg/kg/day)
Calculates single dose (mg) and total daily dose (mg/day) from patient body weight (kg) and prescribed mg/kg regimen.
Unit: mg/dose & mg/dayOpen Calculator →
Calculator Centre
Every calculator includes validated mathematical equations, explicit unit labels, physiological boundary checks, worked examples, rounding rules, and clinical disclaimers.
⚠️ Educational & Clinical Decision Support Disclaimer: Calculations are provided strictly for pharmacy education and reference verification. They are not prescriptions or autonomous clinical orders.
Showing 32 of 32 calculators
BSA-Based Dose Calculator (mg/m²)
Calculates patient Body Surface Area (Mosteller m²) and required drug dose (mg) for mg/m² regimens.
Unit: mg (with BSA in m²)Open Calculator →
Daily Divided Dose Calculator
Divides a total daily mg/kg/day or fixed mg/day regimen into individual scheduled doses by dosing interval (q24h, q12h, q8h, q6h).
Unit: mg/doseOpen Calculator →
Tablet / Capsule Quantity Calculator
Calculates tablets per dose and total tablets to dispense for a complete treatment course.
Unit: tablets/dose & total tabletsOpen Calculator →
Course Duration & Total Liquid/Pack Quantity Calculator
Calculates total volume (mL) and number of bottles/packs needed for a multi-day oral liquid or multidose regimen.
Unit: mL total & bottlesOpen Calculator →
Paediatric Weight-Based Dose & Ceiling Gate Calculator
Calculates paediatric single and daily dose (mg) with automatic adult-ceiling safety capping.
Unit: mg/dose (capped) & mg/dayOpen Calculator →
Paediatric Oral Suspension Volume Calculator (mL per dose)
Converts a weight-based paediatric mg dose into exact mL of oral suspension based on bottle concentration (mg per 5 mL).
Unit: mL/dose (and mg/dose)Open Calculator →
Clark's Rule Calculator (Educational & Exam Reference)
Estimates paediatric dose from adult dose using weight in pounds (lb) or kg for academic/GPAT examination preparation.
Unit: mgOpen Calculator →
Young's Rule Calculator (Educational & Exam Reference)
Estimates paediatric dose for children aged 1–12 years using age in years for academic/GPAT examination preparation.
Unit: mgOpen Calculator →
Fried's Rule Calculator (Educational Infant Reference)
Estimates infant dose (<24 months) from age in months and adult dose for academic/GPAT examination preparation.
Unit: mgOpen Calculator →
Solution Concentration Calculator (mg/mL & mg/5 mL)
Calculates concentration in mg/mL and mg/5 mL from total solute mass (mg) and total solution volume (mL).
Unit: mg/mL & mg/5 mLOpen Calculator →
Required Volume from Stock Concentration Calculator ('Want / Have × Volume')
Calculates exact volume (mL) to withdraw or administer from a liquid or injectable stock solution.
Unit: mLOpen Calculator →
Reconstitution & Powder Displacement Volume Calculator
Calculates exact diluent volume (mL) to add when reconstituting a dry powder vial accounting for powder displacement volume.
Unit: mL diluent & mg/mL finalOpen Calculator →
Stock Dilution Calculator (C₁V₁ = C₂V₂)
Calculates volume of concentrated stock (V₁) and volume of diluent needed to prepare a diluted solution of target concentration (C₂) and volume (V₂).
Unit: mL stock (V₁) & mL diluentOpen Calculator →
Ampoule / Vial Draw-Up Volume & Vial Count Calculator
Calculates exact draw-up volume (mL) and number of single-use ampoules/vials required per dose.
Unit: mL to draw & ampoules neededOpen Calculator →
IV Infusion Flow Rate Calculator (mL/hour)
Calculates infusion pump rate in mL/hr from total infusion volume (mL) and duration (hours or minutes).
Unit: mL/hrOpen Calculator →
IV Gravity Drip Rate Calculator (drops/min — gtt/min)
Calculates gravity IV drip rate in drops/minute (gtt/min) using macrodrip (15 or 20 gtt/mL) or microdrip (60 gtt/mL) sets.
Unit: drops/min (gtt/min)Open Calculator →
Critical Care Infusion Calculator (mcg/kg/min ↔ mL/hr)
Calculates infusion pump rate (mL/hr) for vasopressors/inotropes ordered in mcg/kg/min.
Unit: mL/hr (and mcg/mL)Open Calculator →
Infusion Duration & Drug Delivery Rate (mg/min) Calculator
Calculates total infusion duration (hours & minutes) and drug delivery rate (mg/min) to verify safe administration ceilings (e.g., Phenytoin ≤50 mg/min, Vancomycin ≥60 min).
Unit: hours & mg/minOpen Calculator →
Percentage Strength Calculator (% w/v, % v/v, % w/w)
Calculates solute mass/volume required for a given percentage strength (% w/v, % v/v, or % w/w) and resulting percentage.
Unit: g (or mL) & mg/mLOpen Calculator →
Ratio Strength (1:N) ↔ Percentage & mg/mL Calculator
Converts ratio strength (1:N, e.g., Adrenaline 1:1000 or 1:10,000, KMnO4 1:5000) into % w/v, mg/mL, and mcg/mL.
Unit: mg/mL & % w/vOpen Calculator →
Alligation Alternate Calculator (Two-Strength Mixing)
Calculates exact volumes/weights of a higher-strength (CH) and lower-strength (CL) preparation needed to compound a desired intermediate strength (CD).
Unit: mL of CH & mL of CLOpen Calculator →
Isotonicity Calculator (Sodium Chloride Equivalent E-Value Method)
Calculates grams of Sodium Chloride (NaCl) required to render an ophthalmic, nasal, or parenteral drug solution isotonic with blood/tears (0.9% w/v NaCl).
Unit: g NaCl (and mg NaCl)Open Calculator →
Milliequivalents (mEq), Millimoles (mmol) & Milliosmoles (mOsm) Calculator
Converts electrolyte mass (mg) into mmol, mEq, and theoretical mOsm using molecular weight, valence, and dissociation count.
Unit: mEq (plus mmol & mOsm)Open Calculator →
Body Mass Index (BMI) Calculator (WHO & Asian-Indian Consensus Cut-offs)
Calculates BMI (kg/m²) and classifies nutritional/metabolic status under both WHO international and Asian-Indian consensus thresholds.
Unit: kg/m²Open Calculator →
Body Surface Area (BSA) Calculator (Mosteller & Du Bois)
Calculates patient Body Surface Area (m²) using both Mosteller and Du Bois equations for clinical dosing and renal indexing.
Unit: m² (Mosteller & Du Bois)Open Calculator →
Ideal Body Weight (Devine) & Adjusted Body Weight (AdjBW) Calculator
Calculates Ideal Body Weight (IBW) and 40%-corrected Adjusted Body Weight (AdjBW) for hydrophilic drug dosing (e.g., aminoglycosides) in obesity.
Unit: kg (IBW & AdjBW)Open Calculator →
Creatinine Clearance Calculator (Cockcroft-Gault Equation)
Estimates Creatinine Clearance (CrCl in mL/min) for renal drug dose adjustment across adult patients.
Unit: mL/minOpen Calculator →
Albumin-Corrected Calcium (Payne) & Corrected Phenytoin (Sheiner-Tozer) Calculator
Calculates albumin-corrected total serum calcium (mg/dL) and albumin-corrected phenytoin concentration (mcg/mL) in hypoalbuminaemia.
Unit: mg/dL (Ca) & mcg/mL (Phenytoin)Open Calculator →
Metric Mass Unit Converter (g ↔ mg ↔ mcg ↔ ng)
Converts a drug mass in milligrams (mg) simultaneously into grams (g), micrograms (mcg), and nanograms (ng) to prevent 1000-fold decimal errors.
Unit: mcg, g, and ngOpen Calculator →
Volume & Pharmaceutical Measure Converter (L ↔ mL ↔ μL ↔ tsp/tbsp)
Converts liquid volume in millilitres (mL) into litres (L), microlitres (μL), standard 5 mL metric teaspoons, and 15 mL tablespoons.
Unit: L, μL, 5mL-tsp, 15mL-tbspOpen Calculator →
Concentration Unit Converter (% w/v ↔ mg/mL ↔ mcg/mL ↔ ppm)
Converts percentage concentration (% w/v) simultaneously into mg/mL, mcg/mL, ratio strength (1:N), and parts per million (ppm).
Unit: mg/mL, mcg/mL, ppm & 1:NOpen Calculator →