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Paediatric Weight Based Dose Calculator

Work out paediatric weight based dose instantly with clear inputs, formula shown and shareable results.

About Paediatric Weight Based Dose Calculator

Multiplies child weight by the mg/kg dose and applies the stated single-dose maximum, which becomes binding in older children.

Formula

Paediatric dose

Dose = min(weight x mg/kg, maximum single dose); daily dose = dose x doses per day

Worked example

With the default values below, Paediatric Weight Based Dose Calculator returns Dose per administration of 150.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Child weightaccepts 0.5–80 kg
15 kg
Dose per kilogramaccepts 0.01–200 mg/kg
10 mg/kg
Doses per dayaccepts 1–6
3
Maximum single doseaccepts 1–5,000 mg
500 mg

Results

Dose per administration
150.00 mg
Total daily dose
450.00 mg
Weight-based dose before capping
150.00 mg
Cap status
Weight-based dose used

Step by step

  1. 1Values used
  2. 2Paediatric dose
  3. 3Dose per administration= 150.00 mg
  4. 4Total daily dose= 450.00 mg
  5. 5Weight-based dose before capping= 150.00 mg
  6. 6Cap status= Weight-based dose used

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

When does the cap bite?

Once a child's weight approaches adult size, typically above 40 to 50 kg for most medicines.

Should doses be rounded?

Yes, to a measurable volume or a practical tablet fraction, provided the rounding stays within the safe range.

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