Human Development Index (HDI)

Introduction

• The Human Development Index (HDI) is a composite index developed by the United Nations Development Programme (UNDP) to measure average achievement in key dimensions of human development.
• It was created to shift attention away from judging development only by income and toward people’s overall well-being and capabilities.

Meaning

• HDI is a summary measure of achievements in three basic dimensions of human development:
  • a long and healthy life
  • access to knowledge
  • a decent standard of living.

Purpose

• The main purpose of HDI is to provide a broader way of understanding development than just GDP or per capita income.
• It reflects the idea that development is about expanding people’s choices and freedoms and enabling them to live lives they value.

Three dimensions of HDI

• The HDI measures:
  • health
  • education
  • income.

Health indicator

• The health dimension is measured by life expectancy at birth.

Education indicators

• The education dimension is measured using:
  • expected years of schooling
  • mean years of schooling.

Income indicator

• The standard of living dimension is measured by Gross National Income (GNI) per capita in 2021 PPP dollars in the latest UNDP tables used for the 2025 Human Development Report.

How it is calculated

• HDI is calculated by combining normalized indices for the three dimensions into a single composite value. UNDP’s technical notes provide the current methodology and related calculation tools.

Range of the index

• HDI values range between 0 and 1.
• A value closer to 1 indicates higher human development, while a value closer to 0 indicates lower human development. This follows directly from the UNDP composite-index method.

Categories of human development

• UNDP classifies countries into broad HDI groups such as:
  • very high human development
  • high human development
  • medium human development
  • low human development.

Why HDI is important

• HDI is important because it broadens the understanding of development beyond economic growth alone.
• It helps compare countries not just on income, but also on how people live, learn, and survive.

Difference from GDP per capita

• GDP per capita focuses mainly on economic output or average income.
• HDI includes income, but also adds health and education, making it a more people-centred indicator of development.

Limitations

• HDI is useful, but it does not capture everything.
• It does not fully reflect:
  • inequality within countries
  • gender gaps
  • multidimensional poverty
  • environmental pressures
  • quality of institutions or freedom in every detail. This is why UNDP publishes complementary indices alongside HDI.

Related indices

• UNDP also publishes related indices such as:
  • Inequality-adjusted Human Development Index (IHDI)
  • Gender Development Index (GDI)
  • Gender Inequality Index (GII)
  • Planetary Pressures-adjusted HDI (PHDI).

Latest report context

• The latest UNDP global report is the Human Development Report 2025, released on 6 May 2025. Its theme is “A matter of choice: People and possibilities in the age of AI.”
• UNDP states that the data shown in its country insights and HDI tables were used in preparing the 2025 Human Development Report.

Source institution

• The HDI is published by UNDP through its Human Development Reports and Data Center.

Key points to remember

• HDI = Human Development Index.
• Published by UNDP.
• It measures health, education, and income.
• Indicators used are:
  • life expectancy at birth
  • expected years of schooling
  • mean years of schooling
  • GNI per capita.
• Latest report cycle: Human Development Report 2025.

Conclusion

• The Human Development Index is one of the world’s most widely used indicators for comparing overall development. Its importance lies in measuring development in terms of people’s health, education, and living standards, not just national income.