How to determine your child's height calculator

To determine your child’s adult height, use our science-backed child height calculator by entering their gender, current age (3–18 years), current height, and both parents’ heights. We use trusted pediatric formulas that adjust for gender (girls mature earlier than boys) and genetic potential, outputting a predicted range with a ±3–5 cm margin of error. The tool also accounts for environmental factors like nutrition and activity, providing actionable tips to support healthy growth

How to measure height calculator

To measure height accurately, follow these steps and verify with our tool: Stand barefoot against a flat wall, heels together, shoulders relaxed. Place a rigid object (e.g., a book) on top of the head, parallel to the floor. Mark the wall and measure the distance from floor to mark. Use our unit converter to confirm (cm ↔ ft-in) and input the verified height into our calculators for precise results. We also share tips like measuring in the morning (when heights are slightly taller) for consistency

Teens and young adults wondering how tall will I be can use our height predictor by entering their current age, height, gender, and parents’ heights. For teens (13–17), the tool accounts for remaining growth spurts; for adults, it provides a genetic potential range. While most growth stops after puberty, our calculator offers realistic estimates and growth-support tips (e.g., balanced nutrition, adequate sleep) to help reach full potential

How accurate is height calculator

Our height calculator is 85–90% accurate for children aged 3–18, using proven genetic formulas and updated WHO/CDC growth data. Unit conversions (cm ↔ ft-in) are 100% accurate, adhering to international standards (1 ft = 30.48 cm, 1 inch = 2.54 cm). We disclose a ±3–5 cm margin of error for child height predictions to account for environmental factors.

Height Calculator – Height Prediction, Convert CM to Feet/Inches

Our free height calculator is designed to make all your height-related calculations simple and reliable. Whether you’re a parent curious about your child’s future height, need to convert cm to feet for travel documents, or check if you meet height requirements for a dream career, our tool delivers accurate results in seconds.

Calculate Child's Adult Height

Child’s Adult Height Predictor

How We Calculate Adult Height

Our height calculator uses proven genetic formulas combined with current growth data to predict your child’s adult height. The formula accounts for gender differences (girls typically stop growing earlier than boys) and parental height, with a margin of error of ±3-5 cm (1-2 inches).

Boys: (Father's height + Mother's height + 13) / 2 ± 5 cm
Girls: (Father's height + Mother's height - 13) / 2 ± 5 cm

This method is trusted by pediatricians and provides a reliable estimate, though nutrition, activity level, and overall health can also impact final adult height.

Tip: You can switch between US units (ft/in) and Metric (cm) using the tabs in the right panel.

Calculate Your Child's Adult Height

Child's Gender *

Child's Age (years) *

Child's Current Height (ft/in) *

Father's Height (ft/in) *

Mother's Height (ft/in) *

Height Unit Converter (cm to feet/inches)

Why Unit Conversion Matters

Different countries and industries use different height measurements – most of Europe and Asia use centimeters, while the US, UK, and Canada use feet and inches. Our height calculator makes converting between these units quick and error-free, which is essential for travel documents, medical records, or job applications.

Our conversion formula uses the international standard: 1 foot = 30.48 cm, 1 inch = 2.54 cm. This ensures your converted height is accurate for any official use.

Convert Height Units

Centimeters (cm) to Feet/Inches

Feet/Inches to Centimeters (cm)

How to Use Our Height Calculator

Our height calculator is intuitive and requires just a few simple steps to get precise results:

Select the tool you need (predictor, converter)
Enter the required information – all fields are clearly labeled for accuracy
Click "Calculate" (or get instant results for unit conversions)
View your results with helpful explanations and recommendations

Real‑World Uses of Our Height Calculator

The height calculator helps in everyday decisions and professional scenarios. Here are popular ways people use it:

•Parents estimate adult height and plan sports or clothing with the height calculator.
•Students convert cm to feet/inches for exchange programs using the height calculator.
•Travelers standardize measurements in medical forms with the height calculator.
•Coaches assess team fit and lineup selection using the height calculator.
•HR teams pre‑screen height requirements for roles through the height calculator.