Free Height Tools
Predict your adult height. Find your percentile. Check if your growth plates are still open. Science-backed methods, no signup, no nonsense.
Height Predictor
Khamis-Roche method — the same approach pediatricians use to estimate adult height without bone X-rays. Enter your stats + parents' heights, get your predicted adult height in 30 seconds.
Height Percentile Calculator
See your percentile by age, sex, and country. Based on CDC growth chart data (ages 2-19) and global national-average data (12 countries). Find out if you're top 10%, 50%, or 99%.
Height Comparison Tool
Compare 2–6 heights side by side with proportional SVG silhouettes. Compare yourself to celebrities, friends, or any custom heights. Auto-converts ft↔cm. Generates a shareable link for TikTok or group chats.
Growth Plate Status Quiz
5-question quiz estimates whether your growth plates are still open, closing, or fully fused. Based on Tanner-stage scoring + growth velocity. Find out if you have height ahead.
Will My Kids Be Tall?
Enter your and your partner's heights — get your future kids' predicted adult height. Mid-parental height formula (Tanner). Best when you don't yet have child measurements.
Mid-Parental Height Calculator
The original Tanner-Goldstein-Whitehouse formula. Calculates predicted adult height from parent heights only. Shows the math step-by-step.
Khamis-Roche Calculator
Same engine as the Height Predictor, branded for users searching the formula by name. The clinical-grade adult height prediction without X-rays.
Height Converter
Instant bidirectional converter. Type centimeters or feet+inches — both update in real time. Plus reference rows for common heights (5'9" = 175 cm = US male median).
Wingspan Calculator
Calculate your ape index (wingspan ÷ height). NBA stars like Kawhi sit at 1.10. Estimate wingspan from height (and vice versa) using athletic-population ratios.
Multi-photo analysis, sibling height comparison, country-specific growth charts. Bookmark the page.