FREE HEIGHT CALCULATOR: FEET TO CM, CDC PERCENTILES & CHILD PREDICTOR
Instantly convert your height from feet and inches (ft/in) to centimeters (cm) — predict exactly how tall your child will be using the clinical AAP Mid-Parental Height formula — and check your precise height percentile rank against official US CDC NHANES population data. 3-in-1 calculator. Zero sign-up. Instant results.
3-IN-1 HEIGHT CALCULATOR: CONVERT, PREDICT & RANK (FT/IN & CM)
Fill in any one field — the other two update instantly.
| Country | Avg Men (ft/in) | Avg Men (cm) | Avg Women (ft/in) | Avg Women (cm) |
|---|---|---|---|---|
| 🇺🇸 United States | 5′9.2″ | 175.4 | 5′3.7″ | 161.8 |
| 🇳🇱 Netherlands | 6′0.4″ | 183.8 | 5′7.0″ | 170.4 |
| 🇩🇰 Denmark | 5′11.8″ | 182.6 | 5′6.5″ | 169.0 |
| 🇩🇪 Germany | 5′10.8″ | 179.9 | 5′5.3″ | 165.9 |
| 🇬🇧 United Kingdom | 5′10.0″ | 177.5 | 5′4.9″ | 164.4 |
| 🇦🇺 Australia | 5′10.6″ | 179.2 | 5′5.1″ | 165.2 |
| 🇨🇦 Canada | 5′10.3″ | 178.1 | 5′4.5″ | 163.9 |
| 🇧🇷 Brazil | 5′8.5″ | 173.6 | 5′2.8″ | 159.6 |
| 🇲🇽 Mexico | 5′6.9″ | 169.8 | 5′1.8″ | 157.2 |
| 🇨🇳 China | 5′7.6″ | 171.8 | 5′2.6″ | 159.7 |
| 🇯🇵 Japan | 5′7.2″ | 171.2 | 5′2.4″ | 158.8 |
| 🇮🇳 India | 5′5.2″ | 165.3 | 5′0.4″ | 152.6 |
| 🇵🇰 Pakistan | 5′6.8″ | 169.7 | 5′1.3″ | 155.9 |
| 🇰🇷 South Korea | 5′8.5″ | 173.5 | 5′3.1″ | 160.6 |
| 🇳🇬 Nigeria | 5′7.2″ | 170.6 | 5′2.8″ | 159.7 |
HOW THIS HEIGHT CALCULATOR WORKS: MID-PARENTAL FORMULA & CDC DATA
REAL U.S. EXAMPLES: CHILD PREDICTIONS & ADULT PERCENTILES
PRO TIPS: HOW TO MEASURE ACCURATELY & MAXIMIZE GENETIC GROWTH
HEIGHT FAQS: GENETICS, SLEEP, NUTRITION & BONE AGE
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MEDICAL DISCLAIMER & CDC METHODOLOGY
This calculator is not a certified medical device, clinical diagnostic instrument, or FDA-approved tool. Height conversion, child height prediction, and population percentile estimates are statistical and mathematical computations based on publicly available reference data. They are not substitutes for professional physical examination, bone age assessment (X-ray), or clinical growth evaluation by a licensed healthcare provider.
The Child Height Predictor uses the Mid-Parental Height formula with a published accuracy of ±2 inches (±5 cm) covering approximately 95% of children — meaning 5% of outcomes fall outside this range. Predictions are statistical estimates only and cannot account for individual medical conditions, growth hormone disorders, nutritional deficiencies, chronic illness, or environmental factors unique to each child. The Percentile Calculator references US CDC NHANES population data and is applicable to US populations only. Results for non-US populations will not reflect local reference norms.
Genghis Fitness LLC and its affiliates, authors, editors, and technology providers accept no liability for decisions made based on the results of this calculator. Use of this tool is at the user’s own risk. Genghis Fitness expressly disclaims all warranties — expressed or implied — regarding the accuracy, completeness, fitness for a particular purpose, or clinical applicability of any calculator output. Results should never replace the judgment of a qualified medical professional.
This calculator operates entirely within your browser using client-side JavaScript. No height values, ages, parent heights, or any personal data entered into this tool are transmitted to, stored on, or processed by any external server, database, or third-party service. All inputs are cleared automatically when you reset the calculator or close/navigate away from the page. No cookies are set by the calculator module itself.
The Child Height Predictor is intended as an educational reference for parents and caregivers. A predicted height that falls significantly outside the ±2 inch accuracy band — or any concern about a child’s growth trajectory — should be evaluated by a paediatric endocrinologist using clinical growth charts, bone age radiography, and laboratory testing. This tool does not replace routine well-child visits or developmental assessments.
This Height Calculator page was developed by the Genghis Fitness editorial team — combining fitness science expertise, SEO research, and UX design. All factual claims relating to height data, growth physiology, clinical formulas, and population statistics are sourced exclusively from peer-reviewed research, US government health databases, and clinical guidelines from recognised medical organisations. No AI-generated medical advice is presented as clinical fact — all health-related claims are cross-referenced against the authoritative sources listed below.
Genghis Fitness does not receive funding from pharmaceutical companies, supplement manufacturers, or medical device providers in connection with this content. No height-related supplement, medical treatment, or commercial product is promoted or recommended on this page. Internal links to other Genghis Fitness calculators are for user convenience only. The Related Calculators section does not constitute a medical referral.
CDC NHANES height reference data is updated on a rolling survey cycle (typically every 2 years). This page’s percentile reference tables and population averages will be reviewed and updated following each new NHANES data release. The Mid-Parental Height formula is an established AAP clinical standard and is not subject to frequent revision. Any material changes to methodology or data sources will be noted with an updated date at the top of this page.
All data, formulas, and clinical claims in this calculator and its supporting content are derived from the following peer-reviewed, government, and medical-authority sources. External links open in a new tab.
Certified strength and conditioning specialists with over 10 years of experience in powerlifting, nutrition, and evidence-based fitness content. Based in New York City.