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BMI Formula:
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BMI (Body Mass Index) for 1-year-olds is a measure that compares weight to height squared. For infants and young children, BMI is age- and sex-specific and is often referred to as BMI-for-age, which accounts for normal growth patterns.
The calculator uses the standard BMI formula:
Where:
Note: For children, the calculated BMI should be plotted on a growth chart or compared to age- and sex-specific percentiles for proper interpretation.
Details: BMI helps assess whether a child's weight is appropriate for their height and age. It can indicate potential underweight, healthy weight, overweight, or obesity, which are important for growth monitoring and early intervention.
Tips: Enter weight in kilograms and height in meters. For infants, measure length while lying down (recumbent length) rather than standing height. All values must be valid (weight > 0, height > 0).
Q1: What is a normal BMI for a 1-year-old?
A: Normal BMI varies by age and sex. For 1-year-olds, typically between 14-18 kg/m², but should be compared to WHO growth standards for precise assessment.
Q2: How often should I measure my 1-year-old's BMI?
A: Regular check-ups with your pediatrician will include growth monitoring. Typically at 12, 15, 18, and 24 months during well-child visits.
Q3: Should I be concerned if my 1-year-old's BMI is high?
A: Consult your pediatrician. Rapid weight gain in infancy may be associated with later obesity risk, but growth patterns should be evaluated over time.
Q4: How accurate is BMI for infants?
A: While useful for screening, BMI has limitations in infants. Other measures like weight-for-length percentiles may provide additional information.
Q5: Can I use this calculator for premature infants?
A: For premature infants, use corrected age (age from due date) and consult with your pediatrician for specialized growth charts.