Twitter/X

Our World in Data released an interactive tool (tweet by @MaxCRoser, 2026-05-27)…

2026-05-27 · 09:08 UTC ·@MaxCRoser ·0 min read

Brief

Our World in Data published an interactive projection tool (shared by @MaxCRoser on 2026-05-27) that shows how any country's population could evolve this century. The UN's assumptions provide the default baseline, and users can tweak the three key drivers—fertility (births), mortality (deaths), and migration—to generate alternative demographic scenarios; a brief video demonstrates the interface and outcomes.

Why it matters

Our World in Data released an interactive tool (tweet by @MaxCRoser, 2026-05-27) that projects how a country's demographics could change across the 21st century.

Key details

  • The tool uses the UN's population assumptions as its default baseline but lets users modify the three demographic drivers—births (fertility), deaths (mortality), and migration—to create custom scenarios.
  • The post includes a short video demonstrating the interface and how adjusting births, deaths, and migration alters national population projections over the century.
Source evidence

How will your country's demographics change this century?

At Our World in Data we built a tool to let you see for yourself.

The UN's assumptions are the starting point.

But then you can adjust the three drivers of change — births, deaths, and migration — to what you expect.

Video