Pediatric Dosing Calculator (Weight-Based) Formula
Understand the math behind the pediatric dosing calculator (weight-based). Each variable explained with a worked example.
Formulas Used
Single Dose
single_dose = weight_kg * dose_per_kgTotal Daily Dose
daily_dose = weight_kg * dose_per_kg * doses_per_dayVerified mg/kg/dose
dose_per_dose_kg = dose_per_kgVariables
| Variable | Description | Default |
|---|---|---|
weight_kg | Child Weight(kg) | 25 |
dose_per_kg | Dose per kg(mg/kg) | 10 |
doses_per_day | Doses per Day(times/day) | 3 |
How It Works
Weight-Based Pediatric Dosing
Single Dose = Weight (kg) x Dose (mg/kg)
Daily Dose = Single Dose x Doses per Day
Pediatric medications are typically dosed based on body weight because children's bodies process drugs differently than adults. Always verify doses with a pharmacist or prescribing reference.
Important
This calculator is for educational purposes. Always confirm doses with a healthcare provider and check maximum dose limits.
Worked Example
A 25 kg child prescribed 10 mg/kg three times daily.
- 01Single dose = 25 x 10 = 250 mg
- 02Daily total = 250 x 3 = 750 mg/day
- 03Verify: 750 / 25 = 30 mg/kg/day
Frequently Asked Questions
Why are pediatric doses based on weight?
Children metabolize drugs differently than adults. Weight-based dosing ensures appropriate drug levels based on body size. Using adult doses for children could cause toxicity or underdosing.
Should I round pediatric doses?
Doses are often rounded to practical amounts. For liquid medications, round to the nearest measurable increment. Always check with a pharmacist.
What if the calculated dose exceeds the adult dose?
Pediatric doses should never exceed the maximum adult dose. When the weight-based calculation exceeds the adult limit, use the adult dose as the cap.
Ready to run the numbers?
Open Pediatric Dosing Calculator (Weight-Based)