Growth tracking, height & weight percentiles for babies and preterm infants, BMI, readiness for solids, height prediction and more.

Everything parents need — smart tools to follow your child’s growth and development

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Smart Growth Tracker

All your child’s growth data in one place: enter weight and height, get automatic percentile and BMI insights, with clear visual tracking.

Explore growth tracking
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Height & Weight Percentiles

Check height and weight percentiles based on WHO standards, with clear charts for age and sex.

Check percentiles
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Preterm Growth Percentile

Track growth percentiles for preterm babies using corrected age, with a clearer view for early follow-up.

View preterm percentiles
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BMI Calculator for Kids

Get a quick, easy-to-understand picture of your child’s weight status in relation to age and sex using BMI.

Calculate BMI
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Daily Calorie Calculator

Estimate recommended daily calorie needs based on age, sex, height, weight, and activity level — with a clear and parent-friendly result.

Calculate calories
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Starting Solids Readiness

A short parent questionnaire to help you understand whether your baby shows signs of readiness for solids, with clear guidance on what comes next.

Start the quiz
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Child Height Prediction

Estimate child height using the Khamis-Roche formula. The calculation combines the child’s and parents’ height for a practical statistical prediction.

Predict height
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Baby & Child Stool Color Checker

Select the stool color and get a clear explanation: what may be normal at different ages, when it may relate to diet, and when to speak with a doctor.

Check stool color

Frequently Asked Questions About KidGil Growth Tools

How is adult height prediction calculated, and how accurate is it?
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Our calculator is based on the Khamis-Roche formula, which is considered one of the most reliable methods for predicting adult height without the need for a hand X-ray or bone age assessment. The calculation takes into account the child’s current height, age, weight, and both parents’ height. Still, it is important to remember that this is only a statistical estimate, and final adult height may vary.

📊 What data are the growth percentiles on the site based on?
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All charts and calculators on the site are based on the official World Health Organization (WHO) growth standards, which are widely used in child health care. The results are adjusted according to the child’s sex and exact age for a more precise view of growth.

👶 Can these calculators also be used for preterm babies?
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Yes. The site includes dedicated tools for babies born preterm, including corrected age and growth tracking adapted for early follow-up. One of the advantages of the system is the ability to support a more accurate picture of growth during the first stages of development.

⚖️ What is the difference between BMI for adults and BMI for children?
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Unlike adults, children’s bodies change quickly as they grow, and body composition differs between boys and girls. That is why a BMI calculator for children does not rely only on the formula result itself. Instead, it compares the result to age- and sex-specific percentiles (BMI-for-age), giving a more meaningful picture of growth.

🥄 How can I know if my baby is ready to start solids?
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The general recommendation is to start around 6 months of age, but age is not the only factor. Important signs include good head control, the ability to sit with support, and the fading of the tongue-thrust reflex. Our “Starting Solids Readiness” questionnaire helps parents review these signs in a simple and structured way.

💡 Are these tools suitable for parents who do not really understand percentiles?
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Absolutely. The system presents results in a clear and visual way, with simple explanations next to each measure, so even parents without a medical background can understand what the results mean and where their child stands.