Drug Dose Calculator
India · Paediatric & Adult · mg/kg Weight-Based Dosing
About This Calculator
This weight-based drug dose calculator is designed for common pediatric and adult medications used in India. Select a drug from the dropdown, enter the patient's weight and age, and optionally enter your medicine's specific concentration (like 250mg/5ml) to get exact administration volumes in milliliters (mL).
Included Medications & Standard Dosing (mg/kg)
Our calculator instantly computes exact volumes for the following commonly prescribed medications in India based on standard mg/kg guidelines:
Paracetamol (Calpol, Dolo) Dosage
Calculates the standard pediatric paracetamol dose at 15 mg/kg/dose. Provides instant conversions for 125mg/5ml and 250mg/5ml syrup concentrations to treat fever and pain.
Ibuprofen (Brufen) Dosage
Computes weight-based Ibuprofen dosing at 10 mg/kg/dose. Essential NSAID for pediatric fever management and analgesia.
Amoxicillin (Novamox, Synclomox) Dosage
Provides exact antibiotic syrup volumes based on the standard 25 mg/kg/dose (given TDS). Essential for calculating Amoxicillin 125mg/5ml or 250mg/5ml suspensions.
Amoxicillin-Clavulanate (Augmentin, Clavam) Dosage
Co-amoxiclav pediatric dosing is based on the amoxicillin component (25 mg/kg/dose), easily converting for standard 228mg/5ml syrups.
Azithromycin (Azithral, Zithromax) Dosage
Once-daily macrolide dosing calculated at 10 mg/kg/day. Provides direct mL outputs for 200mg/5ml pediatric suspensions.
Metronidazole (Flagyl, Metrogyl) Dosage
Computes weight-based dosing at 7.5 mg/kg/dose for pediatric gastrointestinal and anaerobic infections.
Cetirizine (Zyrtec, Alerid) Dosage
Antihistamine dosage calculated at 0.25 mg/kg for allergic rhinitis and related conditions in children.
Adrenaline / Epinephrine Dosage
Crucial emergency anaphylaxis dosage computed at 0.01 mg/kg for 1:1000 IM administration.
Salbutamol (Asthalin, Ventolin) Dosage
Calculates exact nebulizer solution (0.15 mg/kg) or MDI puff requirements for acute pediatric bronchospasm.
Diazepam (Valium, Calmpose) Dosage
Computes acute seizure management doses at 0.3 mg/kg for intravenous or rectal administration.
ORS (Oral Rehydration Solution)
Calculates exact rehydration fluid volumes based on WHO Plan A and B (50-100 ml/kg) for diarrheal dehydration.
Adding Custom Drugs
Use the "+ Add Drug" button to add any medication not included in the default list. You can set the specific mg/kg dosing rules, max doses, and custom syrup concentrations. Your custom drugs are saved locally in your browser and will be available the next time you open the page.
Frequently Asked Questions
How do you calculate pediatric drug doses by weight?
Pediatric drug doses are calculated by multiplying the child's weight in kilograms (kg) by the recommended medication dose in milligrams per kilogram (mg/kg). For example, if a child weighs 10 kg and the paracetamol dose is 15 mg/kg, the total dose is 150 mg.
How do I convert an mg dose to ml for syrups?
To convert a milligram (mg) dose to a milliliter (mL) volume for a liquid syrup, divide your calculated mg dose by the concentration of the syrup (mg per mL). For example, if you need 150 mg of a drug and the syrup is 250mg/5ml (which equates to 50mg/ml), you divide 150 by 50 to get exactly 3 mL.
What is the normal paracetamol dose for children?
The standard pediatric dose for paracetamol (acetaminophen) is 10 to 15 mg/kg per dose. This can be given every 4 to 6 hours as needed for fever or pain. Do not exceed 4 doses in a 24-hour period.
Can I add my own custom drugs to this calculator?
Yes. You can use the '+ Add Drug' button to save custom medications, including their specific mg/kg dosing rules and syrup concentrations. These are securely saved in your local browser.
Disclaimer
For use by qualified healthcare professionals only. This calculator is a clinical aid. Always verify calculated doses against current prescribing guidelines (e.g., Indian Pharmacopoeia, IAP guidelines) and adjust for individual patient factors such as renal or hepatic impairment.