Pediatric Medication Dose Scaling (BSA Mosteller, Clark Weight & Young Age Rules) Calculator

Compare BSA-scaled (BSA/1.73), Clark Weight-scaled, and mg/kg pediatric dosages.

BSA-Scaled Pediatric Dose (Mosteller / 1.73 m²)
245.43 mg
Mosteller Body Surface Area (BSA) 0.85 m²
Clark’s Weight-Rule Dose (Wt / 68 kg) 161.76 mg
Effective Dose per kg Bodyweight 11.16 mg/kg
Inputs
⚡ Scenarios:
kg
Child body weight in kilograms.
cm
Child standing height in centimeters.
mg
Standard adult single dose in milligrams (mg).
Results & Graph
BSA-Scaled Pediatric Dose (Mosteller / 1.73 m²)
245.43 mg
Mosteller Body Surface Area (BSA)
0.85 m²
Clark’s Weight-Rule Dose (Wt / 68 kg)
161.76 mg
Effective Dose per kg Bodyweight
11.16 mg/kg

BSA-Scaled Pediatric Dose (Mosteller / 1.73 m²)

Graph 1 • Pediatric Dose Scaling • Domain Architecture & Live Telemetry Maps Child Weight Kg, Child Height Cm, Adult Reference Dose Mg through Pediatric Dose Scaling Formula.
Pediatric Dose Scaling • Clinical & Physiological Reference Scale Low / Baseline Target / Reference Elevated / Watch High / Action BSA-Scaled Pediatric Dose (Mosteller / 1.73 m²): 245.43 mg Mosteller Body Surface Are 0.85 m² Clark’s Weight-Rule Dose ( 161.76 mg Effective Dose per kg Body 11.16 mg/kg
Graph 2 • BSA-Scaled Pediatric Dose (Mosteller / 1.73 m²) Across Child Weight Kg Sweep (40% → 160%) Evaluates BSA_m² = √((Height_cm × Weight_kg) / 3600); BSA_Dose = AdultDose × (BS across 7 operating points (current input highlighted).
0 mg 170.7 mg 341.5 mg 155.2 8.80kg 190.1 13.20kg 219.5 17.60kg 245.4 22kg 268.9 26.40kg 290.4 30.80kg 310.4 35.20kg
Graph 3 • Joint Sensitivity: Child Weight Kg × Child Height Cm Compares BSA-Scaled Pediatric Dose (Mosteller / 1.73 m²) when Child Height Cm is shifted +25% (solid) vs. −25% (dashed).
0 mg 172.1 mg 344.1 mg --- Child Height Cm @ 75% 229.6 -30% 253.0 -15% 274.4 +0% 294.3 +15% 312.9 +30%
Summary: At 22 kg and 118 cm (Mosteller BSA = 0.85 m²), the BSA-scaled dose is 245.4 mg and Clark’s weight-rule dose is 161.8 mg.
Summary: At 22 kg and 118 cm (Mosteller BSA = 0.85 m²), the BSA-scaled dose is 245.4 mg and Clark’s weight-rule dose is 161.8 mg.
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Formula & Mathematical Methodology: Pediatric Dose Scaling Formula

BSAm² = (Heightcm × Weightkg / 3600)
BSADose = AdultDose × (BSAm² / 1.73)
BSA_m² = √((Height_cm × Weight_kg) / 3600); BSA_Dose = AdultDose × (BSA_m² / 1.73)
  • childWeightKg: Child Weight Kg (kg)
  • childHeightCm: Child Height Cm (cm)
  • adultReferenceDoseMg: Adult Reference Dose Mg (mg)

Rounding: Clinical scores round to statutory integer or decimal precision; physiological metrics round to 2 decimal places.

Worked Example: Clinical / Physiology Scenario: Pediatric Dose Scaling

Compare BSA-scaled (BSA/1.73), Clark Weight-scaled, and mg/kg pediatric dosages.

  1. Enter lab values, anthropometric measurements, or performance test metrics.
  2. Evaluate the reference equation: BSA_m² = √((Height_cm × Weight_kg) / 3600); BSA_Dose = AdultDose × (BSA_m² / 1.73).
  3. Inspect the primary classification, supporting indices, and 3 SVG charts.
Result: Computes Pediatric Dose Scaling via BSA_m² = √((Height_cm × Weight_kg) / 3600); BSA_Dose = AdultDose × (BSA_m² / 1.73).

Frequently Asked Questions

How does the Pediatric Medication Dose Scaling (BSA Mosteller, Clark Weight & Young Age Rules) Calculator compute its result?

It evaluates BSA_m² = √((Height_cm × Weight_kg) / 3600); BSA_Dose = AdultDose × (BSA_m² / 1.73) directly in your browser and updates three custom SVG visualizations in real time.

Can I use Goal Seek to solve backwards for a target lab value or pace?

Yes. Click "🎯 Goal Seek" in the results toolbar to solve backwards for any numeric input parameter.

Are my health and biometric inputs kept private?

Yes. All calculations run 100% locally on your device with zero external transmission.

Health & Fitness · Pediatrics, OB/GYN & Dosing

Pediatric Medication Dose Scaling (BSA Mosteller, Clark Weight & Young Age Rules) Calculator: inputs, method, and how to read the result

Compare BSA-scaled (BSA/1.73), Clark Weight-scaled, and mg/kg pediatric dosages.

Choose inputs for the case you are checking

The defaults are illustrative. Replace them with values for your case and keep the units shown beside each field.

  • Child Weight Kg: Child body weight in kilograms.
  • Child Height Cm: Child standing height in centimeters.
  • Adult Reference Dose Mg: Standard adult single dose in milligrams (mg).

What the calculation includes

With the default values shown, BSA-Scaled Pediatric Dose (Mosteller / 1.73 m²) is 245.43 mg. The calculation follows Pediatric Dose Scaling Formula; the formula and variable definitions above show how the inputs combine.

One-input check: With the other defaults held constant, changing Child Weight Kg from 22 kg to 24 kg changes BSA-Scaled Pediatric Dose (Mosteller / 1.73 m²) from 245.43 mg to 256.34 mg. This is a comparison inside the calculator's stated model, not a prediction.

Where to use caution

  • Uses peer-reviewed clinical and sports physiology formulas.
  • For educational and informational reference only; clinical scores do not replace physician judgment or laboratory reference ranges.

Scope: Global Clinical & Sports Science Consensus Check the assumptions and limitations against your situation before relying on the estimate.

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