Home Back

Infant Weight Percentage Calculator

Percentage Weight Loss Formula:

\[ \text{Percentage Weight Loss} = \left( \frac{\text{Birth Weight} - \text{Current Weight}}{\text{Birth Weight}} \right) \times 100 \]

kg
kg

Unit Converter ▲

Unit Converter ▼

From: To:

1. What is Infant Weight Percentage Calculator?

The Infant Weight Percentage Calculator calculates the percentage of weight loss in newborns from their birth weight. This is an important metric for assessing neonatal health and nutrition.

2. How Does the Calculator Work?

The calculator uses the following formula:

\[ \text{Percentage Weight Loss} = \left( \frac{\text{Birth Weight} - \text{Current Weight}}{\text{Birth Weight}} \right) \times 100 \]

Where:

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

3. Importance of Weight Loss Calculation

Details: Monitoring weight loss in newborns is crucial as excessive weight loss may indicate feeding problems, dehydration, or other health issues that require medical attention.

4. Using the Calculator

Tips: Enter both weights in kilograms. For accurate results, use precise measurements from calibrated scales. Normal newborns may lose up to 7-10% of birth weight in the first week.

5. Frequently Asked Questions (FAQ)

Q1: What is normal weight loss for a newborn?
A: Most newborns lose 5-7% of birth weight in first few days, with 10% often considered the upper limit of normal.

Q2: When should I be concerned about weight loss?
A: Consult a pediatrician if weight loss exceeds 10% or if the infant shows signs of dehydration (fewer wet diapers, lethargy, sunken fontanelle).

Q3: How often should I weigh my newborn?
A: In the first week, daily weights may be helpful. After that, weekly weights are usually sufficient unless there are concerns.

Q4: When should birth weight be regained?
A: Most infants regain birth weight by 10-14 days of age with adequate feeding.

Q5: Does this apply to premature infants?
A: Premature infants may have different weight loss patterns and should be monitored more closely by healthcare professionals.

Infant Weight Percentage Calculator© - All Rights Reserved 2025