1. What is Birth Weight Percentage Calculator?

The Birth Weight Percentage Calculator calculates the percentage of weight loss or gain relative to a child's birth weight. This is particularly important for monitoring newborn growth and nutritional status in the early days and weeks after birth.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• \( \text{Birth Weight} \) — The child's weight at birth (kg)
• \( \text{Current Weight} \) — The child's current weight (kg)

Explanation: The formula calculates what percentage of the original birth weight has been lost or gained.

3. Importance of Weight Loss Calculation

Details: Monitoring weight changes relative to birth weight is crucial for assessing newborn health. Excessive weight loss may indicate feeding problems or other health issues, while appropriate weight gain shows healthy development.

4. Using the Calculator

Tips: Enter birth weight and current weight in kilograms. Both values must be positive numbers. The calculator will show the percentage of weight loss or gain relative to birth weight.

5. Frequently Asked Questions (FAQ)

Q1: What is normal weight loss after birth?
A: Newborns typically lose 5-7% of their birth weight in the first few days, and should regain it by 10-14 days. Losses >10% may require evaluation.

Q2: How often should weight be measured?
A: For newborns, weight should be measured daily in the first week, then weekly until birth weight is regained.

Q3: When should I be concerned about weight loss?
A: Consult a pediatrician if weight loss exceeds 10% of birth weight or if the baby hasn't started gaining by day 5-7.

Q4: Does this apply to premature babies?
A: Premature infants may lose more weight (10-15%) and take longer to regain it. Special growth charts are used for preemies.

Q5: What if my baby gains weight instead?
A: The calculator will show a negative percentage, indicating weight gain. This is normal after the initial postnatal weight loss.