Ideal Body Weight Calculator Paediatric

Ideal Body Weight Formula:

\[ IBW (kg) = \frac{(height (cm)^2 \times 1.65)}{1000} \]

Ideal Body Weight (IBW):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is the Ideal Body Weight Formula?

The Ideal Body Weight (IBW) formula for paediatric patients calculates the expected healthy weight based on height. This specific formula (height² × 1.65 / 1000) is designed for children and provides a more accurate estimation than adult formulas.

2. How Does the Calculator Work?

The calculator uses the paediatric IBW equation:

\[ IBW (kg) = \frac{(height (cm)^2 \times 1.65)}{1000} \]

Where:

\( height \) — Height in centimeters (cm)
\( 1.65 \) — Constant multiplier for paediatric patients
\( 1000 \) — Divisor to convert result to kilograms

Explanation: This formula squares the height measurement, multiplies by a paediatric-specific constant, then divides by 1000 to convert the result to kilograms.

3. Importance of IBW Calculation

Details: Calculating ideal body weight is essential for paediatric medication dosing, nutritional assessment, growth monitoring, and determining appropriate weight ranges for medical procedures.

4. Using the Calculator

Tips: Enter height in centimeters. Ensure accurate measurement for precise results. This calculator is specifically designed for paediatric patients.

5. Frequently Asked Questions (FAQ)

Q1: What age range is this formula appropriate for?
A: This formula is specifically designed for paediatric patients, typically from 1 year to adolescence.

Q2: How does paediatric IBW differ from adult calculations?
A: Paediatric formulas account for different body proportions and growth patterns, using different constants than adult IBW formulas.

Q3: When should IBW be used instead of actual weight?
A: IBW is particularly important for medication dosing in obese children and for nutritional assessment where actual weight may not reflect lean body mass.

Q4: Are there limitations to this formula?
A: Like all estimation formulas, it may be less accurate for children with unusual body proportions, certain medical conditions, or extreme heights.

Q5: How often should IBW be recalculated for growing children?
A: For medical purposes, IBW should be recalculated with each significant height measurement, typically at regular health check-ups.