Human Development Index

Also called: HDI · Topic: Measuring Development: Income, HDI and Sustainability · NCERT: Class 10, Ch 1 "Development"; Class 11, Ch 4 "Human Capital Formation in India"; Class 11, Ch 8 "Comparative Development Experiences of India and its Neighbours"; Class 11, Ch 7 "Index Numbers"

Meaning

The Human Development Index (HDI) is UNDP's composite index (one number made by combining several indicators). It runs from 0 to 1 and measures a country's average achievement in three areas: a long and healthy life, knowledge, and a decent standard of living.

• Formula (since 2010): HDI = (I_health × I_education × I_income)^(1/3). This is the geometric mean: multiply the three dimension indices, then take the cube root.
• Why it matters: GDP counts money. The HDI checks whether people actually live longer, learn more and earn enough to choose the lives they value. It is the main global yardstick of development beyond income, and India's rank is often in the news.

Explanation

Why the HDI exists: from income to human development

• Human development is the process of widening people's choices so they can live long, healthy, educated lives that they value.
• It treats people as ends in themselves, not only as workers who produce output.

• Every individual has a right to be literate and lead a healthy life.

• Income alone is not enough (Class 12, National Income Accounting):

• GDP does not show how income is distributed. GDP can rise while the poor get poorer.
• GDP leaves out non-monetary exchanges, such as unpaid work at home.

• GDP ignores externalities (harm or benefit to others that nobody pays for, e.g. factory pollution).

• Intellectual roots:

• Mahbub ul Haq, a Pakistani economist, launched UNDP's first Human Development Report (HDR) in 1990. Amartya Sen helped him design the index.
• Sen's capability approach judges development by people's real freedoms (capabilities), not income. Functionings are what a person actually is or does, such as being well fed. Capabilities are the full set of functionings a person is free to choose from. His key book is Development as Freedom (1999).
• Class 10 NCERT: "Human" is put before "Development" because what matters is "what is happening to citizens … their health, their well being".

The three dimensions, indicators and goalposts

Goalposts are fixed minimum and maximum values. They turn indicators with different units (years, dollars) into scores between 0 and 1.

Dimension	Indicator	Goalposts (min – max)
Long and healthy life	Life expectancy at birth (average years a newborn is expected to live)	20 – 85 years
Knowledge	Expected years of schooling (EYS): the years of school a child of school-entry age can expect to get if today's enrolment rates continue	0 – 18 years
	Mean years of schooling (MYS): the average years of education that adults aged 25+ have actually completed	0 – 15 years
Decent standard of living	GNI per capita (2021 PPP $), log-transformed	$100 – $75,000

• GNI (Gross National Income) = GDP + net income from abroad.
• PPP (purchasing power parity) is an exchange rate that adjusts for local prices, so that $1 buys the same basket of goods in every country.

How the number is calculated

1. Dimension index = (actual value − minimum) ÷ (maximum − minimum)
2. Education index = (MYS index + EYS index) ÷ 2

3. Income index = [ln(GNI pc) − ln(100)] ÷ [ln(75,000) − ln(100)] - The log (ln) is used because each extra dollar matters less as income rises. - $1,000 more changes a lot for a family earning $2,000 a year. It changes very little for a family earning $60,000.

4. HDI = (I_health × I_education × I_income)^(1/3)

Worked example: India (HDR 2025, data year 2023)

• Health index = (72.0 − 20) ÷ (85 − 20) = 52 ÷ 65 = 0.800
• EYS index = 13.0 ÷ 18 = 0.722. MYS index = 6.9 ÷ 15 = 0.460.
• Education index = (0.722 + 0.460) ÷ 2 = 0.591
• Income index = ln(9,047 ÷ 100) ÷ ln(75,000 ÷ 100) = 4.505 ÷ 6.620 = 0.681
• HDI = (0.800 × 0.591 × 0.681)^(1/3) = (0.322)^(1/3) ≈ 0.685

Why a geometric mean? What makes the HDI rise or fall

• A weak score in one dimension is not fully made up for by a strong score in another. Balanced progress scores higher.
• Country A has indices 0.9, 0.9, 0.3. Arithmetic mean = 2.1 ÷ 3 = 0.700. Geometric mean = (0.243)^(1/3) ≈ 0.624.
• Country B has indices 0.7, 0.7, 0.7. Both means = 0.700.

• So balanced B ranks above lopsided A.

• The HDI rises when:

• people live longer (better health care, nutrition, sanitation)
• children stay longer in school, and adults have more completed years of education

• real income per person grows, but because of the log, income gains count for less at high levels

• Raising the weakest dimension lifts the HDI most. For India, that is schooling.

• The old method (before 2010):
• It was an arithmetic mean (simple average) of life expectancy, education and GDP per capita (PPP).
• Education used the adult literacy rate (2/3 weight) plus the combined gross enrolment ratio (GER) (1/3 weight). GER is total enrolment at a level of schooling, as a percentage of the population of the official age for that level.
• The 2010 revision made three changes. MYS and EYS replaced literacy and GER. GNI replaced GDP. The geometric mean replaced the arithmetic mean.

HDI categories

Category	HDI value
Very high	≥ 0.800
High	0.700 – 0.799
Medium	0.550 – 0.699
Low	< 0.550

In India

• Who measures it: UNDP publishes the HDI in its annual Human Development Report. India's own data (life expectancy, schooling, income) feed into it.
• HDR 2025 was released on 6 May 2025. India ranks 130 of 193 countries [2].
• HDR 2025's theme: "A matter of choice: People and possibilities in the age of AI".
• India's HDI value rose from 0.676 (2022) to 0.685 (2023) [2]. It stays in the medium category but is close to the high threshold of 0.700 [2].
• India's rank moved from 133 (2022) to 130 (2023) [2].
• India's HDI value has risen by over 53% since 1990. This is faster than both the global and the South Asian averages [2].

• Life expectancy rose from 58.6 years (1990) to 72.0 years (2023), the highest since the index began [2].

• The weak link is schooling.

• Education index 0.591 vs health index 0.800 (2023).

• Adults (25+) have only 6.9 years of schooling on average, less than half the 15-year goalpost. EYS is 13.0 years (2023).

• Inequality:

• The Inequality-adjusted HDI (IHDI) lowers each dimension's score according to how unequally it is shared among people.

• Inequality cuts India's HDI by 30.7% (2023), one of the highest losses in the region [2].

• Gender gaps: female labour force participation and women's political representation lag behind [2]. The constitutional amendment reserving one-third of legislative seats for women is seen as a hopeful step [2].

• Neighbours (HDR 2025, data year 2023):
• Bangladesh is tied with India at 130 [2]. It has lower GNI per capita ($8,498 vs India's $9,047) but higher life expectancy (74.7 vs 72.0 years).
• Sri Lanka (rank 89) is ahead of India on every item: GNI pc $12,616, life expectancy 77.5 years, MYS 10.8 years.
• Bhutan ranks 127, above India [2]. China has an HDI of 0.797. Pakistan ranks 168 with an HDI of 0.544, which puts it in the low category.
• Rank conflict: the UN India press release gives China 75th, Sri Lanka 78th and Myanmar 149th [2]. The NCERT figures are China 78, Sri Lanka 89 and Myanmar 150. Check the HDR 2025 statistical table before quoting these ranks.

• Nepal: NCERT says Nepal has better life expectancy than India. HDR 2025 data do not support this: Nepal is at 70.4 years vs India's 72.0.

• NCERT table errors:

• Class 10 Table 1.6 heads the rank column "2021-22", but the values are HDR 2025's figures for 2023.

• Class 11 Table 8.5 gives MYS for people "aged 15 and above" and "in %". UNDP uses 25 and above, and MYS is measured in years, not per cent.

• Global picture: HDR 2025 finds that world human development progress is now at its slowest pace since 1990 [4].

• Newer data: no HDR 2026 had been found in official sources as of September 2026. UNdata lists its next HDI data update for 1 December 2026 [3]. Quote HDR 2025 for now, but check again before the exam.

Don't confuse with

• Human capital: this treats education and health as inputs that raise labour productivity, so people are a means to more output. Human development, which the HDI measures, treats people as ends in themselves.
• GDP / GNI per capita: this measures income only. In the HDI it is just one of three dimensions, and it enters as a log of GNI (not GDP) per capita in 2021 PPP $.
• Inequality-adjusted HDI (IHDI): the HDI is a national average. The IHDI lowers each dimension's score by how unequally it is shared. For India, inequality cuts the HDI by 30.7% (2023) [2].
• Pre-2010 HDI: the old index was an arithmetic mean using adult literacy, GER and GDP per capita. The current HDI is a geometric mean using MYS, EYS and GNI per capita.

Prelims Hooks

• The HDI's three dimensions are life expectancy at birth, knowledge (MYS + EYS) and GNI per capita (2021 PPP $, log-transformed). Trap: the income indicator is GNI, not GDP.
• Goalposts: life expectancy 20–85 years; EYS 0–18; MYS 0–15 (adults 25+); GNI per capita $100–$75,000.
• Since 2010, the HDI has been a geometric mean. Trap: "arithmetic mean of literacy, enrolment and GDP" describes the pre-2010 method.
• The first HDR came out in 1990 under Mahbub ul Haq (UNDP). Amartya Sen supplied the capability approach (Development as Freedom, 1999).
• HDR 2025: India ranks 130/193, with HDI 0.685 (2023), up from 0.676 (2022). It is in the medium category (0.550–0.699) and tied with Bangladesh [2].
• Categories: very high ≥ 0.800; high 0.700–0.799; medium 0.550–0.699; low < 0.550. Pakistan (0.544) is "low".

Mains Points

• Schooling is India's weakest HDI link (GS-II/III).
• The education index is 0.591 vs 0.800 for health (2023), and adult MYS is only 6.9 years.
• Under the geometric mean, raising the weakest dimension lifts the HDI most.

• So spending on foundational learning and adult education gives the highest payoff.

• Growth is not the same as development.

• Bangladesh has lower income than India but equal HDI rank and higher life expectancy. Sri Lanka is far ahead on health and schooling.

• How growth is shared through public health and education matters more than GDP alone. This is the capability-approach argument.

• Averages hide inequality, and the HDI has limits.

• A 30.7% IHDI loss and low female labour force participation [2] mean the national HDI overstates what the typical Indian actually has. Policy should target gender, region and caste, not only national averages.
• The HDI leaves out freedom, environment, security and the quality of schooling. That is why companion indices such as the IHDI and gender indices exist.
• An HDI rise bought with natural-resource loss may not last, which links the HDI to sustainability.

Related concepts

• Human development
• Capability approach
• Mean years of schooling

Read more

• Human development: the idea and the HDI