Pediatric Weight-Based Dosing Calculator
mg/kg dose from body weight.
Enter your values
Enter the child's weight in kg.
Enter the prescribed dose in mg/kg.
Enter the doses per day you are working with.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Dose per administration
- 180 mg
- Total daily dose
- 540 mg
Quick answer
Weight-based dosing multiplies the child's weight by the prescribed mg/kg dose to get the total dose.
dose (mg) = weight(kg) x mg/kg
At a glance
| What it does | mg/kg dose from body weight. |
|---|---|
| Category | Health |
| Inputs needed | Child's weight, Prescribed dose, Doses per day |
| Main output | Dose per administration |
| Formula | dose (mg) = weight(kg) x mg/kg |
| Cost | Free — no sign-up, no download |
How to use the Pediatric Weight-Based Dosing Calculator
- 1Enter the child's weight and the mg/kg dose specified by a prescriber or drug reference.
- 2Multiply by frequency to see the total daily dose.
- 3This is a calculation aid only, not medical advice — always confirm doses with a pharmacist or physician, and never exceed labelled maximums.
Inputs explained
- Child's weight(kg)
- Enter the child's weight in kg.
- Prescribed dose(mg/kg)
- Enter the prescribed dose in mg/kg.
- Doses per day
- Enter the doses per day you are working with.
Worked example
Using the values the calculator loads with:
Inputs
- Child's weight18 kg
- Prescribed dose10 mg/kg
- Doses per day3
Results
- Dose per administration180 mg
- Total daily dose540 mg
Frequently asked questions
Is this safe to use for actual dosing decisions?
Use it only to double-check arithmetic; final dosing must be confirmed by a qualified healthcare professional.
What if the mg/kg range varies?
Enter the low and high ends separately to see the full dosing range.
What do I need to enter into the Pediatric Weight-Based Dosing Calculator?
Just 3 values: child's weight, prescribed dose, doses per day. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Pediatric Weight-Based Dosing Calculator work out the answer?
Weight-based dosing multiplies the child's weight by the prescribed mg/kg dose to get the total dose. It applies the formula dose (mg) = weight(kg) x mg/kg and shows the working so you can check each step by hand.
Is the Pediatric Weight-Based Dosing Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.