Dataset · World Bank Group

Harmonized Test Scores

4 years, 2010–2020 · 172 countries

Harmonized test scores put the results of different international and regional student assessments onto one scale, so that learning can be compared across most of the world. 300 marks minimum attainment and 625 advanced attainment.

This site holds every year from 2010 to 2020, read from World Bank Group’s own data and stored exactly as published.

Open Harmonized Test Scores, 2020 Download all 4 · CSV See it charted by country →

Share this page

Harmonized Test Scores · the file

Newest: Harmonized Test Scores, 2020
Held: 4 years · 601 rows
Licence: CC BY 4.0

4years held
2010–2020years
601rows across every year
172countries in the newest
1measure
CC BY 4.0licence

014 years

Every year

Newest first. Each opens the full table for that year, and each downloads as a CSV.

2010bar height: countries covered, up to 1722020

Every year of Harmonized Test Scores held on this site, newest first, with its download files.
Year	Countries	Change	Read	Download
Harmonized Test Scores, 2020Newest	172	+6	September 26, 2026	CSV
Harmonized Test Scores, 2018	166	+10	September 26, 2026	CSV
Harmonized Test Scores, 2017	156	+49	September 26, 2026	CSV
Harmonized Test Scores, 2010	107	—	September 26, 2026	CSV

Every year in one file, one row per country per year: harmonized-test-scores-all-editions-nations-inquiry.csv

023 columns

What’s in the file

Every column, what it holds, how it is stored and what its values look like — what a reader needs before opening the file.

Every column in the newest file of Harmonized Test Scores: what it holds, how it is stored, and its range.
Column	What it holds	Stored as	Range, 2020	Distinct
Country`country`Name	The country’s name, as this file spells it.	Text	—	172
ISO Code`country_code`Identifier	The ISO 3166-1 alpha-3 code, added by this site. Every table here joins on it.	Text · 3 letters	—	172
Harmonized test score (TIMSS-equivalent points, 300–625)`harmonized_test_score`Headline	The headline figure: Harmonized test score (TIMSS-equivalent points; 300 = minimum, 625 = advanced attainment).	Number · up to 12 decimals	304.92Niger575.27Singaporemiddle 414.32	172

Profiled from the newest file. Range: the lowest and highest value, with the country holding it when only one does. Spread: countries in ten equal steps from lowest to highest. A higher value is the better result.

03172 countries across every year

Who is covered

How many countries each year holds, continent by continent, who joined and who left, and which places this site covers that the dataset never has.

All regions

Countries in each year of Harmonized Test Scores, by continent.
	2010	2017	2018	2020
Africa	27	45	45	46
Americas	15	22	28	28
Asia	25	43	43	46
Europe	38	38	38	39
Oceania	2	8	12	13
All	107	156	166	172

Who joined and who left

2020
+ Belarus+ Brunei+ Bhutan+ Central African Republic+ Fiji+ Uzbekistan
2018
+ Antigua and Barbuda+ Dominica+ Micronesia+ Grenada+ Saint Kitts and Nevis+ Saint Lucia+ Marshall Islands+ Palau+ Saint Vincent and the Grenadines+ Samoa
2017
+ Afghanistan+ Angola+ Armenia+ Bangladesh+ China+ DR Congo+ Comoros+ Dominican Republic+ Ethiopia+ Gabon+ Ghana+ Guinea+ Guyana+ Honduras+ Haiti+ India+ Iraq+ Jamaica+ Kyrgyzstan+ Cambodia+ Kiribati+ Laos+ Liberia+ Sri Lanka+ Mali+ Myanmar+ Mongolia+ Mozambique+ Mauritania+ Niger+ Nigeria+ Nicaragua+ Nepal+ Pakistan+ Philippines+ Papua New Guinea+ Palestine+ Rwanda+ Sudan+ Solomon Islands+ Sierra Leone+ El Salvador+ South Sudan+ Tajikistan+ Tonga+ Tuvalu+ Tanzania+ Vanuatu+ Yemen

Not in this dataset · 53 places this site covers

World Bank Group gives no figure for these in any year held here. It is the publisher’s choice of scope, and each place’s profile shows what is measured.

04Provenance

Where it comes from

The path from the publisher to this page, and what was checked and changed on the way.

The site’s method

1 · Publisher
World Bank Group
worldbank.org
2 · Their file
Harmonized Test Scores 2020
HD.HCI.HLOS
3 · Read by this site
September 26, 2026
Imported by a script that parses each figure and writes it down unrounded.
4 · Stored as
4 files, one per year
Each downloads as a CSV, or every year together as harmonized-test-scores-all-editions-nations-inquiry.csv
5 · Used on
Its statistic page, and every profile it measures
/statistics/harmonized-test-scores

Precision

The headline is stored to 12 decimals, as published.

Rounded by this site

Never. Tables on screen may show fewer decimals; the files never do.

Changed by this site

Reshaped into one row per country: regional and income-group totals are left out, only the columns listed are kept, each row gets its ISO 3166 code, and some country names are brought to one spelling. No value is recalculated, rescaled or rounded.

The World Bank’s Human Capital Index, through its indicator API (HD.HCI.HLOS), covering 107 to 172 countries across the four editions.

05Reuse

Licence and credit

What the publisher’s licence lets you do, what it asks of you, and a credit line and citation ready to copy.

Every publisher’s terms

Licence · checked September 26, 2026

CC BY 4.0

Share and redistribute it
Adapt it and build on it
Use it commercially
Credit the publisher
Say what you changed

Share, adapt and use commercially. Credit the publisher and say if you changed anything.

A credit line

Source: World Bank Group, Harmonized Test Scores, via Nations Inquiry.

Cite this dataset

World Bank Group. Harmonized Test Scores, 2010–2020 [data set]. As held by Nations Inquiry, https://nationsinquiry.com/datasets/harmonized-test-scores

The publisher’s own citation: World Bank. The Human Capital Index. Washington, DC: World Bank Group. Method: Patrinos, H. A. and Angrist, N. (2018), Global Dataset on Education Quality: A Review and Update (2000–2017), Policy Research Working Paper 8592.

Plain-language summary, not legal advice. The licence text is what binds.

06Questions