Calculator Inputs
Example Data Table
These examples are generic demonstrations of the calculator workflow.
| Case | Medication | Weight | Ordered Basis | Interval | Stock Strength | Final Volume | Time | Why It Helps |
|---|---|---|---|---|---|---|---|---|
| 1 | Medication A | 18 kg | 15 mg/kg/dose | q8h | 100 mg / 2 mL | 20 mL | 30 min | Shows a standard weight-based intermittent infusion. |
| 2 | Medication B | 42 lb | 10 mg/kg/day | q6h | 250 mg / 5 mL | 25 mL | 60 min | Demonstrates pound-to-kilogram conversion and daily splitting. |
| 3 | Medication C | 7.5 kg | 75 mcg/kg/dose | q12h | 1 mg / 1 mL | 10 mL | 20 min | Useful for microgram-based pediatric orders. |
| 4 | Medication D | 30 kg | 20 mg/kg/day | q24h | 500 mg / 10 mL | 100 mL | 90 min | Illustrates max-dose review with a larger bag volume. |
Formula Used
Weight conversion:
kg = lb ÷ 2.2046226218
If you enter pounds, the calculator converts weight to kilograms before any dose calculation.
Single-dose calculation:
Single dose (mg) = Weight (kg) × Ordered dose
For microgram orders, the result is divided by 1000 to convert micrograms to milligrams.
Daily-dose calculation:
Doses/day = 24 ÷ Interval hours
Daily dose (mg/day) = Single dose × Doses/day
If the order is written per day, the calculator first finds the daily total, then divides by doses per day.
Capped dose logic:
Final single dose = minimum of calculated dose, max single dose, and max daily dose ÷ doses/day
This lets you enforce a single-dose cap, a daily cap, or both.
Preparation and rate formulas:
Stock concentration (mg/mL) = Stock amount (mg) ÷ Stock volume (mL)
Drug volume (mL) = Final single dose (mg) ÷ Stock concentration (mg/mL)
Rate (mL/hr) = Final infusion volume (mL) ÷ Time (min) × 60
The chart and summary cards are based on these calculations.
How to Use This Calculator
- Enter the medication name for clear documentation.
- Add age and patient weight.
- Select kilograms or pounds for the entered weight.
- Enter the ordered dose value and choose the correct basis.
- Set the dosing interval in hours.
- Add optional maximum single-dose and daily-dose limits.
- Enter the stock amount and stock volume to define concentration.
- Enter the final infusion volume if the dose will be diluted.
- Enter infusion time and, if needed, drop factor and rounding increment.
- Press the calculate button to show the result above the form.
- Download the result or example table as CSV or PDF.
FAQs
1) What does this pediatric IV dose calculator estimate?
It estimates weight-based single doses, daily totals, drug volume, final diluted concentration, infusion rate, and optional drops per minute from values you enter.
2) Does this calculator contain medication-specific pediatric dosing recommendations?
No. It is a flexible math tool. You must enter the prescribed dose basis, concentration, and any applicable maximum limits from your drug reference or institutional protocol.
3) Why can I enter weight in pounds?
Some users receive weight in pounds first. The calculator converts pounds to kilograms immediately so the math follows metric-based dosing inputs.
4) What is the difference between mg/kg/dose and mg/kg/day?
mg/kg/dose calculates each administration directly from weight. mg/kg/day calculates the total daily amount first, then divides it across the number of doses per day.
5) Why are maximum single-dose and maximum daily-dose fields optional?
Not every order needs both caps. These fields let you apply one, both, or neither, depending on how the medication order or protocol is written.
6) What does rounded drug volume mean?
It shows a practical preparation volume rounded to the increment you choose, such as 0.1 mL. The exact calculated volume is also shown for comparison.
7) What if the final infusion volume is smaller than the drug volume?
The calculator blocks that entry. A final diluted volume cannot be smaller than the calculated drug volume that must be drawn from stock.
8) Can I use this for pump setup or manual drip estimates?
Yes, for math support. It calculates mL/hr and optional drops per minute when you enter a drop factor, but actual administration settings still need independent verification.