Custom cohort lens
Age-group calculator
Choose any five-year age range, country, and available year. See its population, share, and male/female split.
Use the data
Population data tools
Answer specific age-structure questions without downloading a spreadsheet or writing code.
Side by side
Country comparison
Compare two pyramids and eight demographic measures on one page.
Choose the right tool
From a broad shape to a specific cohort
Compare composition
Use the country comparison when you need to see whether two populations are youthful, ageing, or shaped by particular adult cohorts. Both charts share a percentage scale.
Measure a custom age range
Use the age-group calculator for questions such as ages 5–19, 20–34, 65+, or 80+. It returns counts and shares without estimating from the chart.
Check change over time
Open a country profile to switch among eight age structures from 1950 to 2100 and connect them to population, fertility, longevity, and growth.
Data coverage
Both tools use the same 237 country and area profiles from UN World Population Prospects 2024. Age distributions are available for 1950, 1975, 2000, 2023, 2026, 2050, 2075, and 2100.
Years through 2023 are historical estimates. Later years use the UN medium projection. Values are loaded only when a tool needs them, keeping the rest of the site fast.
What the tools do not do
They do not provide single-year-of-age interpolation, probabilistic intervals, subnational populations, or live census counts. Use the official UN portal for the full scenario set and formal extraction.
Calculation details and source filenames are available in the methodology.