WiseCalcs

Height Calculator - Convert Units and Compare Heights

Our height calculator converts measurements between centimetres and feet/inches, compares your height to global averages, and predicts a child's potential adult height. Whether you're tracking growth, comparing international measurements, or planning for the future, this comprehensive tool provides accurate calculations and meaningful comparisons.

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Height Calculator

Calculator

Height Calculator

Convert height between centimetres and feet/inches, compare to global averages, and predict a child's adult height using the mid-parental height formula.

Height converter

In centimetres

175 cm

In feet & inches

5′ 8.9″

Global average height (Male): 178.4 cm — -3.4 cm below average

Child height predictor (mid-parental method)

Predicted adult height

177.5 cm(5′ 9.9″)

Typical range (±8.5 cm): 169–186 cm

Based on the Tanner mid-parental height formula. Genetics account for ~80% of height; nutrition and health also play a role.

What is a Height Calculator?

A height calculator is a versatile tool that performs multiple height-related calculations and conversions. Most commonly, it converts height measurements between the metric system (centimetres) used in most countries and the imperial system (feet and inches) still used in some regions. Beyond simple conversion, modern height calculators offer additional functionality including comparisons with population averages and growth predictions.

Height measurements serve various purposes in daily life, from medical assessments and clothing sizing to sports eligibility and ergonomic planning. Different countries and industries use different measurement systems, making conversion tools essential for international communication and comparison. The ability to contextualise your height against population norms also provides valuable perspective on where you stand relative to others.

The Mid-Parental Height Formula

For predicting a child's adult height, the most widely used method is the mid-parental height formula. This genetic-based calculation considers both parents' heights to estimate their child's potential adult stature.

For boys:

Predicted Height=Father’s Height+Mother’s Height+13cm2\text{Predicted Height} = \frac{\text{Father's Height} + \text{Mother's Height} + 13\text{cm}}{2}

For girls:

Predicted Height=Father’s Height+Mother’s Height−13cm2\text{Predicted Height} = \frac{\text{Father's Height} + \text{Mother's Height} - 13\text{cm}}{2}

The 13-centimetre adjustment accounts for the average height difference between males and females. This formula provides a reasonable estimate with a typical margin of error of ±10 centimetres. Genetic factors account for approximately 80% of height determination, while nutrition, health, and environmental factors influence the remaining 20%. The prediction becomes more accurate as children approach their final adult height, typically reached by age 16-18 for girls and 18-21 for boys.

Step-by-Step Example

Let's calculate the predicted adult height for a 10-year-old boy whose father is 180cm tall and mother is 165cm tall.

Using the mid-parental height formula for boys:

  • Father's height: 180cm
  • Mother's height: 165cm
  • Add 13cm for male adjustment: 180 + 165 + 13 = 358cm
  • Divide by 2: 358 ÷ 2 = 179cm

The predicted adult height is 179cm (approximately 5 feet 10.5 inches). This means the child will likely reach between 169cm and 189cm as an adult, considering the typical ±10cm margin of error.

For comparison, the global average male height is approximately 171cm, so this predicted height would be above average. In countries like the Netherlands where average male height is 184cm, this would be considered slightly below average, while in countries with shorter average heights, it would be well above average.

How to Use the Calculator

Our height calculator features three main functions accessible through simple input fields. For unit conversion, enter your height in either centimetres or feet/inches, and the calculator instantly displays the equivalent in the other system. The conversion is precise to decimal places, ensuring accuracy for all applications.

For height comparison, input your height and select your gender and age group. The calculator compares your measurements against global averages and provides percentile rankings. This shows what percentage of the population is shorter or taller than you.

For growth prediction, enter both parents' heights and the child's gender. The calculator applies the mid-parental height formula and displays the predicted adult height along with the typical range. Remember that predictions are estimates and actual results may vary due to health, nutrition, and other environmental factors.

Global Height Variations and Trends

Height varies significantly across different populations and regions worldwide. The Netherlands consistently ranks as having the tallest average height, with men averaging 184cm and women 171cm. Other Northern European countries including Denmark, Norway, and Germany also feature prominently in global height rankings. In contrast, countries in Southeast Asia and parts of Africa tend to have shorter average heights, often influenced by historical nutritional and healthcare factors.

Secular trends show increasing heights in most developed countries over the past century, primarily due to improved nutrition, healthcare, and living conditions. However, this trend has plateaued in some wealthy nations while continuing in developing countries experiencing economic growth. According to research from Imperial College London, South Korean women and Iranian men have experienced some of the largest height increases over recent decades.

Understanding these variations helps contextualise individual measurements and explains why height standards differ across industries and regions. Athletes, for instance, may compare themselves to sport-specific averages rather than general population data, while medical professionals consider ethnic and regional factors when assessing growth patterns in children.

Frequently Asked Questions

The mid-parental height formula typically predicts adult height within ±10 centimetres of the actual result. Genetic factors account for about 80% of height determination, making this formula reasonably reliable. However, nutrition, health conditions, and environmental factors can influence the remaining 20%, potentially affecting the final outcome.
Girls typically reach their full adult height between ages 16-18, while boys continue growing until ages 18-21. Growth plates usually close during late adolescence, marking the end of height increase. However, individual timing varies significantly based on genetics, nutrition, and the onset of puberty.
Different countries use different measurement systems - most use centimetres while some use feet and inches. Additionally, average heights vary significantly by population due to genetic, nutritional, and environmental factors. Dutch men average 184cm while men in some other regions average 160cm or less.
Yes, nutrition significantly impacts growth and can cause children to fall short of their genetic potential. Proper nutrition during childhood and adolescence is crucial for reaching predicted height. Malnutrition, chronic illness, or eating disorders can prevent children from achieving their genetically determined stature.
To convert feet and inches to centimetres, multiply feet by 30.48 and inches by 2.54, then add the results. For example, 5 feet 8 inches equals (5 × 30.48) + (8 × 2.54) = 152.4 + 20.32 = 172.72 centimetres.
Height classifications vary by region and gender. Globally, men above 185cm and women above 170cm are generally considered tall. Heights below 165cm for men and 152cm for women are typically classified as shorter than average, though these standards differ significantly across populations.
Consult a healthcare provider if a child's growth rate slows significantly, falls well below family predictions, or shows sudden changes. Regular monitoring during childhood helps identify potential issues early. Growth charts and percentile tracking provide better indicators than single measurements.