Two countries, one crowd

Why the same scale matters

Two big numbers are hard to tell apart in a list. Draw each country as a crowd where every dot is the same number of people, and the area is the answer: a country with half the people has half the dots. The year slider keeps that scale for both, so a country that is shrinking visibly loses dots while the other one gains them.

Estimates and projections

Up to 2025 the figures are estimates built from censuses and registers. From 2026 to 2050 they are projections that assume current birth, death and migration trends continue. The dashed part of the line and the shaded band mark that change — a projected crossover is a consequence of those assumptions, not a date anyone has measured.

What is not here

Only total population. Age structure, cities, income and migration are not compared, and a small number of places have gaps in some years. Countries are listed as the World Bank lists them, which includes some territories.

How to read the screen

The page has three parts that always agree with each other. The sentence at the top gives one ratio for the year on the slider. The crowd below it shows the same two populations as dots, so you can judge the difference by eye before you read any number. The chart of lines shows the whole span from 1960 to 2050, with a marker at the year you are looking at. Moving the slider changes all three at once, and picking different countries redraws all three for the new pair.

You can reach a pair from the lists on this page, from the ranking tables, or by choosing both countries yourself in the two pickers. The address of the page carries the pair and the year in its query string when you follow one of the links here, so a link to a particular comparison opens on that comparison. A short list of pairs you looked at can be kept on your own device; it is stored in the browser and is not sent to any server.

What the numbers measure

Every figure is total resident population: the number of people the statistics count as living in a country or area in a given year. The series is the World Bank's "Population, total" indicator (SP.POP.TOTL), taken from its population estimates and projections database, which is itself assembled from United Nations and national statistics. This site holds 217 countries and areas, and the world total it quotes in rankings is the sum of those entries (8.19 billion in 2025), not an independent count of everyone alive.

The comparison pages also quote land area, fertility rate, life expectancy, the share of people aged 65 and over, and the urban share. Each comes from its own World Bank indicator, taken at the latest year the source has a value for, which is why a country page may say a fertility figure is for 2024 while the population figure is for 2025. The full list of indicators and the licence are on the sources page.

Estimates, projections and the dashed part of the line

Up to 2025 a value is an estimate: the best reconstruction of a population from the latest censuses, registration systems and surveys, adjusted for births, deaths and migration. From 2026 the values are projections. A projection takes current patterns of fertility, mortality and migration and carries them forward. It does not know about a war, an epidemic, a change of policy or a sudden change in migration, and the further it runs the more such things can matter. For that reason the chart marks the projected years differently, and the sentence on every page says when a result lies inside the projection.

One consequence is worth keeping in mind. Two countries that are close in size can swap order within a year or two when the source is revised, and a projected crossover is the year at which two assumed curves meet, not a date anyone will observe. Treat a crossover as "around then, if trends hold".

Good uses

• Explaining a headline: set the two countries in a news story side by side and see whether "twice as large" is a fair description.
• Teaching: show a class how fast populations grew after 1960, and why the world total moved from about 3.01 billion to 8.19 billion counted here.
• Presentations: the dots make a ratio visible to an audience that will not read a table.
• Checking intuition: guess the ratio first, then open the pair and compare your guess with the crowd.

What it does not do

It compares totals only. It does not compare ages, cities, languages, incomes, economies or how many people live in a country who were born elsewhere. It does not forecast, and it does not rank countries by anything other than head count. It also does not tell you which figure is "more accurate": a country that last held a full census long ago has a less certain estimate than one that counted recently, and the totals here carry no error bars.

Questions

Why are the dots all the same size?

Because the area is the message. If each dot is one fixed number of people, a country with half the population has half the dots, and nothing about the drawing can exaggerate a gap.

Why does a projected number differ from one I saw elsewhere?

Organisations publish different revisions and use different assumptions. The figures on this site are one consistent series, so two countries are always compared on the same basis even when another source would disagree on both.

Are territories counted as countries?

The list follows the World Bank, which includes some territories and special administrative regions as separate entries. That is why the list has more than 210 entries.

Is anything I choose sent to you?

No. The comparison runs in your browser from data already in the page, and the saved list stays on your device.