Dosage Calculator
Calculate appropriate medication doses based on body weight and prescription
Calculate Medication Dosage
Choose Calculation Method
Enter patient's current body weight
Prescribed dose per kilogram of body weight
How many times per day the medication is taken
Additional Calculations
Dosage Results
Dosage Calculation Formulas
Example Calculation
Antibiotic Dosage Example
Patient: 70 kg adult
Prescribed dosage: 10 mg/kg per day
Frequency: 3 times daily
Tablet strength: 250 mg per tablet
Calculation
Total daily dose = 70 kg × 10 mg/kg = 700 mg
Single dose = 700 mg ÷ 3 = 233.3 mg
Tablets per dose = 233.3 mg ÷ 250 mg = 0.93 tablets
Result: Take approximately 1 tablet, 3 times daily
Critical Medical Disclaimer
This calculator is for educational purposes only and should never replace professional medical advice.
- Always follow your healthcare provider's specific instructions
- Verify all calculations with a pharmacist or doctor before taking medication
- Individual patient factors may require dose adjustments
- Never alter prescribed doses without medical supervision
- In case of doubt, contact your healthcare provider immediately
Quick Reference
Common Units
Safety Tips
Types of Dosing
Fixed Dosage
Same dose for everyone (e.g., vaccines)
Age-based
Dose varies by patient age
Weight-based
Dose calculated per kg body weight
Variable
Patient adjusts as needed (e.g., insulin)
Important Notes
Never exceed prescribed dosage
Consider patient's kidney/liver function
Age affects drug metabolism
Always verify with healthcare provider
Understanding Medication Dosage Calculation
Why Calculate Dosage?
Proper dosage calculation is crucial for medication safety and effectiveness. The famous physician Paracelsus stated: "The dose makes the poison." This principle still holds true today.
Weight-based Dosing
- •Ensures appropriate dose for body size
- •Critical for pediatric patients
- •Important for certain adult medications
- •Reduces risk of under or overdosing
Dosage Forms
Oral Medications
- • Tablets and capsules
- • Liquid syrups and solutions
- • Most common route
Parenteral
- • Intravenous (IV)
- • Intramuscular (IM)
- • Subcutaneous (SC)
Safety Considerations
Always double-check dosage calculations and verify with healthcare providers. Individual patient factors such as age, kidney function, liver function, and drug interactions can affect appropriate dosing.
Remember
- • This calculator provides estimates only
- • Always consult healthcare providers for medical decisions
- • Individual patient factors may require dose adjustments
- • Never alter prescribed doses without medical supervision