LogoPractical Web Tools

Free Forever

All our tools are completely free to use. No account required, No hidden fees and No subscriptions.

Fast & Secure

All processing happens in your browser. Your files never leave your device.

No File Size Limits

Convert files of any size. No restrictions on file sizes or number of conversions.

Batch Processing

Convert multiple files at once to save time and effort.

File Converters

  • PDF Tools
  • Image Converter
  • Video Converter
  • Audio Converter
  • Document Converter
  • eBook Converter
  • Archive Tools
  • File Tools

Calculators

  • Finance Calculators
  • Health Calculators
  • Math Calculators
  • Science Calculators
  • Other Tools

Popular Tools

  • PDF to Word
  • HEIC to JPG
  • Merge PDF
  • Fillable PDF Creator
  • Mortgage Calculator
  • BMI Calculator
  • AI Chat

Company

  • About Us
  • Blog
  • Contact
  • Request a Tool

Legal

  • Privacy Policy
  • Terms of Service
Email Support
Practical Web Tools Logo
Practical Web Tools

Free Tools — Your Files Never Leave Your Device

Practical Web Tools - Convert files & chat with AI — fully offline | Product Hunt

© 2026 Opal Emporium LLC. All rights reserved.

Privacy-first file conversion and AI chat. No accounts, no uploads, no tracking.

  1. Home
  2. Other Tools
  3. Height Calculator

Height Calculator

Convert heights between units (cm, feet, inches, meters), predict child adult height from parents, and calculate height percentiles.

Results

Height

5'7"

170 cm

Meters1.7 m
Inches66.93 in

What do you want to calculate?

Enter Height

Results

Feet & Inches

5'7"

Centimeters

170 cm

Meters

1.7 m

Total Inches

66.93 in

Actions

Common Height Conversions

Feet/InchesCentimetersMeters
5'0"152.41.52
5'4"162.561.63
5'6"167.641.68
5'8"172.721.73
5'10"177.81.78
6'0"182.881.83
6'2"187.961.88
6'4"193.041.93

Average Heights by Country

CountryMenWomen
Netherlands6'0" (183.8 cm)5'7" (170.4 cm)
Denmark5'11" (181.4 cm)5'6" (168.7 cm)
Germany5'11" (180.3 cm)5'5" (166.2 cm)
United States5'9" (175.3 cm)5'4" (162.6 cm)
United Kingdom5'10" (177.5 cm)5'5" (164.4 cm)
Japan5'7" (171.2 cm)5'3" (158.8 cm)
China5'7" (169.7 cm)5'2" (158.6 cm)
India5'5" (165.3 cm)5'0" (152.6 cm)

Quick Answer

To predict a child's adult height: add mother's and father's heights, add 5 inches for boys or subtract 5 inches for girls, divide by 2. This mid-parental height method gives a rough estimate within 4 inches. Example: Mom 5'4" (64") + Dad 5'10" (70") = 134", for a boy: (134+5)/2 = 69.5" (5'9.5"). Genetics, nutrition, and health also affect final height.

Key Facts

  • Mid-parental height formula: (Mom + Dad + 5 for boys / -5 for girls) / 2
  • Height prediction accuracy: typically within 4 inches of actual
  • 1 inch = 2.54 centimeters
  • 1 foot = 12 inches = 30.48 centimeters
  • Average US male height: 5'9" (175.3 cm); Female: 5'4" (162.6 cm)
  • Most growth occurs before puberty; growth plates close around 16-18 (girls) and 18-21 (boys)
  • Height is 60-80% determined by genetics
  • Bone age X-rays provide more accurate height predictions

Frequently Asked Questions

1 inch = 2.54 cm, 1 foot = 12 inches = 30.48 cm, 1 meter = 100 cm. To convert feet/inches to cm: (feet × 30.48) + (inches × 2.54). For example, 5'10" = (5 × 30.48) + (10 × 2.54) = 177.8 cm.

1 inch = 2.54 cm, 1 foot = 30.48 cm. 5'10" = 177.8 cm.

The mid-parental height method predicts adult height within ±8.5 cm (3.3 inches) for about 95% of children. Actual height depends on many factors including nutrition, health, and genetics beyond just parental height.

Accurate within ±8.5 cm for 95% of cases. Many factors affect actual height.

Height percentile indicates what percentage of the population is shorter than you. At the 75th percentile, you're taller than 75% of people. The 50th percentile is average. Percentiles vary by age and gender.

Shows what % of people are shorter. 75th percentile = taller than 75%.

Global averages vary by country. In the US: men average 5'9" (175 cm), women average 5'4" (163 cm). Netherlands has the tallest average: men 6'0" (183 cm), women 5'7" (170 cm). Averages have increased over the past century.

US: Men 5'9" (175 cm), Women 5'4" (163 cm). Varies by country.

Most people stop growing between ages 16-18 (girls) or 18-21 (boys). Growth plates in bones close after puberty ends. Factors affecting growth include genetics, nutrition, sleep, and hormones.

Girls: 16-18 years. Boys: 18-21 years. After growth plates close.

Results

Height

5'7"

170 cm

Meters1.7 m
Inches66.93 in