Height Calculator for Adults and Children
Height Calculator
Height Converter & Calculator
Quick Conversions
Current Height
Height Distribution
Height Reference
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The height calculator converts between feet/inches and centimeters, estimates adult height from a child's current height (mid-parental height method), and provides context about average heights by age, sex, and country. Whether you need height for a medical form, are tracking a child's growth, or are just curious, this tool has you covered.
Height Unit Conversions
1 inch = 2.54 cm 1 foot = 30.48 cm 1 cm = 0.3937 inches Feet and inches to cm: cm = (Feet × 12 + Inches) × 2.54 Cm to feet and inches: Total inches = cm / 2.54 Feet = int(Total inches / 12) Inches = Total inches mod 12
5'10" = (5×12+10) × 2.54 = 70 × 2.54 = 177.8 cm
Predicting Adult Height
The mid-parental height method estimates a child's genetic height potential based on parent heights. It accounts for the fact that children's heights tend to regress toward the mean compared to parents.
For boys: (Father's Height + Mother's Height + 5 in) / 2 For girls: (Father's Height + Mother's Height - 5 in) / 2 (in inches, ±4 inches typical range) Metric: Replace 5 in with 13 cm
This is a statistical estimate. Actual adult height is influenced by nutrition, health, and other factors.
Frequently Asked Questions
What is the average height for men and women?⌄
In the United States, the average height for men is approximately 5'9" (175.3 cm) and for women is 5'4" (161.8 cm). Averages vary significantly by country -- the Dutch are the world's tallest at about 6'0" for men, while some Southeast Asian countries average under 5'5" for men. Global average height has increased significantly over the past 150 years due to improved nutrition.
At what age do people stop growing?⌄
Most girls stop growing in height around ages 15-17, typically 2-3 years after their first menstrual period. Most boys continue growing until ages 17-20. Growth plates (epiphyseal plates) at the ends of long bones fuse when growth hormones decrease, permanently stopping height increase. Some people experience small additional gains into their early 20s.
Can nutrition affect how tall I grow?⌄
Yes, significantly. Chronic malnutrition in childhood reduces growth potential. Adequate protein, calcium, vitamin D, and overall caloric intake during growth years are essential. Populations in wealthier countries with better nutrition are substantially taller than their ancestors from the same genetic backgrounds. However, once growth plates fuse, nutrition cannot increase height.
Does standing up straight increase measured height?⌄
Good posture can make you appear 1-2 inches taller but does not change your actual skeletal height. You are also slightly taller in the morning than at night (by about 1-2 cm) because spinal discs decompress during sleep. Medical height measurements are typically done in the morning for standardization.