Pediatric Dose Calculator
Calculate safe pediatric medication dosages based on weight or age. Supports mg/kg, mg/m², and fixed dosing.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the Pediatric Dose Calculator
- Select Dose Type – Choose from Weight-based (mg/kg), BSA-based (mg/m²), or Fixed Dose. The form will show only the required fields.
- Enter Patient Data:
- For Weight-based: Enter weight in kg (e.g., 20). Optionally enter age in years.
- For BSA-based: Enter body surface area in m² (e.g., 0.8).
- For Fixed: No extra data needed.
- Set Dose Parameters:
- Dose per Unit: The prescribed amount per kg, per m², or fixed (e.g., 5).
- Unit: Choose mg, mcg, or g.
- Max Single Dose (optional): Enter a cap (e.g., 1000). Not available for fixed doses.
- Frequency: How many times per day (e.g., 3).
- Calculate – Click the Calculate Dose button. The result shows the single dose and total daily dose.
Important: All weights must be in kilograms and BSA in square meters. Use positive numbers only. The calculator will cap the dose if a maximum is set.
Previous Results
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Frequently Asked Questions
Select the dose type (weight-based, BSA-based, or fixed), enter the required values (weight, age, BSA), dose per unit, frequency, and optional max dose. Click Calculate to get the per-dose and daily dose.
mg/kg dosing is based on the child's weight, while mg/m² dosing uses body surface area (BSA), which accounts for both weight and height. BSA is often used for chemotherapy drugs.
Yes, you can enter a maximum single dose. If the calculated dose exceeds this value, it will be capped at the maximum. This is useful for medications with safety limits.
The calculator supports mg, mcg, and g. Select the appropriate unit for your medication.
