Tally counts the people who live inside an area you choose: a shape you draw, a circle round a point, or a whole country.
The population figures are Meta's High Resolution Population Density Maps. They spread each country's census over the buildings seen in satellite images, in squares about 30 metres across. Jersey, which Meta's maps leave out, uses WorldPop instead. Most of the figures describe the years 2018 to 2020.
Tally adds those squares up into hexagons, and counts the hexagons whose centre is inside your area. Fine hexagons follow its edge more closely. Country outlines come from geoBoundaries.
Point at a hexagon on the map, or tap it on a touch screen, to see how many people live in that hexagon alone. Its colour shows how densely they live there.
These are modelled estimates, not a census. They are good for “about how many”, and least certain near coasts and borders and where places have grown fast. Do not rely on them alone for safety or legal decisions.
Everything is counted here, in your browser. The shapes you draw and their counts are never sent anywhere. The site counts page visits, without cookies.
Population data comes by country. A country saves itself the first time you count there. Save more below while you are online and you can count in them with no connection at all, though the background map shows only places you have viewed recently. Remove a country to free the space.
For areas, densities, the radius and the map's scale bar.
Installing puts Tally on your desktop or home screen. It opens in its own window and starts without an internet connection. It installs the app only: population data is saved country by country, above.
Your browser installs apps from its own menu: in Safari, File › Add to Dock on a Mac or Share › Add to Home Screen on an iPhone or iPad. Chrome and Edge show an Install button here. Firefox cannot install web apps.