Why does Greenland look bigger than Africa on most world maps?

Greenland looks about the same size as Africa on most world maps. It isn't. Africa is 14 times larger. Here's the math behind one of the most consequential visual lies in geography — and what to use instead.

The map you grew up with — Mercator projection

Below is the world rendered in Mercator, the projection used on virtually every school wall map of the 20th century and Google Maps from launch in 2005 until 2018. Greenland is highlighted in red, Africa in green, the USA in blue.

Mercator projection. Greenland appears nearly as large as Africa. USA appears about the size of Australia. Antarctica clipped at 85°S (the Web Mercator standard).

Look at Greenland. Look at Africa. They appear roughly the same size — Greenland might even look larger. Now look at the USA. It looks comparable to Australia.

Now compare the same data, same countries, rendered on an equal-area projection.

The same countries on an equal-area projection

The map below uses Equal-Earth — a projection designed in 2018 specifically to preserve area while keeping continent shapes recognisable. Same data, same highlighted countries, same graticule. The only thing that changed is the projection.

Equal-Earth projection. Country areas are now to scale. Africa is visibly enormous; Greenland is the small red speck above Canada; the USA is visibly smaller than Australia and dwarfed by Africa.

Greenland is the small red splotch near the top — it looks tiny next to Africa, because it istiny next to Africa. Africa is the third-largest continental landmass on Earth (after Eurasia and Antarctica); Greenland is the world's largest island, but at 836,000 square miles it's smaller than every other continent and smaller than 12 individual countries.

Visual proof — Tissot's indicatrix

The clearest way to see Mercator distortion is to overlay the projection with Tissot's indicatrix: a grid of circles that all represent the same area on the sphere. Place one circle at the equator, one at 75° North — both cover the same number of real square miles on the actual planet.

On Mercator, the polar circles balloon to many times the size of the equatorial ones. The distortion isn't subtle; it's the entire structure of the projection made visible.

Mercator with Tissot's indicatrix. Each red circle is the same geodesic area (~4° radius on the sphere ≈ 276 mi). Equatorial circles look small; polar circles look enormous.

Now the same circles on Equal-Earth:

Equal-Earth with the same Tissot grid. All circles are visually the same size — the projection preserves area. The shapes are slightly stretched (no projection preserves both area and angle — Gauss's Theorema Egregium), but the size is honest.

Africa next to Greenland at true scale

Instead of looking at the world map, place Africa and Greenland next to each other at the same equal-area scale. This is the visual the rest of the internet skips.

Africa next to Greenland at true equal-area scale. Africa is 14 times larger.

The two outlines are rendered through the same equal-area projection at the same pixels-per-mile — no zoom trickery. Greenland is the small shape on the right. Africa is the colossal one on the left. This is the comparison Mercator hides.

The math — why Mercator does this

Mercator works by stretching the map vertically. Specifically, at any latitude φ, the linear scale factor is 1/cos(φ).

At the equator (φ = 0°), 1/cos(0°) = 1. No stretching.

At 60° N or S, 1/cos(60°) = 2. Linear distances doubled, areas quadrupled.

At 72° N (Greenland's rough centroid), 1/cos(72°) ≈ 3.24. Linear stretch 3.24×, area inflation 3.24² ≈ 10.5×.

At 85° (the limit of Web Mercator), 1/cos(85°) ≈ 11.47. Area inflation ≈ 132×. This is why Mercator world maps either cut off above 85° or show Antarctica stretching across the entire bottom of the map.

Apparent vs. actual size — 13 countries + Africa

The table below lists each country's actual area (in square miles), the Mercator inflation factor at its approximate centroid, and the apparent area a viewer would estimate from a Mercator map.

Notice Brazil and Australia: both at low latitudes, their apparent area is almost identical to their actual area. Now notice Greenland: actual 836,000 sq mi but apparent 8.7 million sq mi — slightly smallerthan Africa's 11.7 million. Greenland looks 80% the size of Africa on Mercator; it's actually 7%.

Russia is the most consequential case. Russia is the largest country in the world by actual area (6.6 million sq mi). On Mercator, with mean latitude 62°, it inflates to ~28 million sq mi — making it appear over twice the size of Africa, when in reality Africa is 1.8× larger.

Alaska vs Mexico — another case Mercator gets wrong

Look at any Mercator world map. Alaska looks enormous compared with Mexico — at least three or four times larger. Most Americans would, if forced to guess, place Alaska comfortably ahead.

In reality, Mexico is 14% larger than Alaska. 758,449 sq mi vs 665,384 sq mi. Mexico is the bigger of the two by every credible measurement.

Mexico (left) next to Alaska (right) at true equal-area scale. Mexico is slightly larger.

Alaska's mean latitude is around 64°N, where Mercator inflates area by ~5×. Mexico's mean latitude is around 23°N, where the inflation is just 1.18×. That difference is the entire reason for the visual lie.

Test it yourself — the drag-and-drop tools

The most famous interactive tool for this is TheTrueSize.com — it lets you grab any country with your mouse and drag it across the map. As you drag, the country re-projects through Mercator at the new latitude, so the country's apparent size changes dramatically. Drag Greenland down to the equator and watch it shrink to its real, modest size. Drag Tanzania up to the Arctic and watch it triple in apparent area.

SimpleMapLab's own equal-area visualisation is the Size Comparisons cluster — 23 articles, each using equal-area overlays to compare countries, US states, and continents. The relevant ones for this article:

• Greenland vs USA — fits inside the contiguous US 4.5 times
• USA vs Africa — Africa is 3 times larger than the contiguous US
• Greenland vs Antarctica — Antarctica is 6.5× the size of Greenland, and unlike Mercator suggests, Antarctica is not infinite
• Russia vs Canada— Russia looks 4× Canada on Mercator; it's actually 1.7×
• USA vs Russia— Mercator inflates Russia to ~7× the apparent size of the USA; it's actually 1.74× larger

Why this matters beyond geography class

For 450 years, almost every world map produced in the West used the Mercator projection. It sat on classroom walls, in atlases, in news graphics, in airline magazines. By the late 20th century, a generation of teachers had taught a generation of students that the world looked like the Mercator projection.

The cultural consequences are real. Mercator makes Europe and North America loom large in the northern half of the map — both are at higher latitudes than the equator, so both get inflated. Africa, South America, and most of southern Asia sit closer to the equator and look correspondingly smaller relative to their actual sizes.

Bono and the late Arno Peters made this argument famous in the 1970s and 80s. Peters proposed an equal-area projection (now called Gall-Peters) to correct the distortion. Critics objected to the projection's ugly shapes, and the Gall-Peters projection was largely sidelined. But the underlying point — that the map shapes our mental model of the world's relative sizes — has aged well.

Africa is 30.4 million km², larger than the United States, China, India, Mexico, Japan, and most of Europe combined. Mercator hides this. Equal-area maps don't.

So why does anyone still use Mercator?

Because it does one thing perfectly: it preserves angles.

If you draw a straight line on a Mercator map, that line corresponds to a single constant compass bearing in the real world. Such a path is called a rhumb line or loxodrome. For 16th-century sailors trying to plot a course without GPS, this property was lifesaving. You set your compass, you sail in a straight line on the chart, and you arrive.

Aeronautical charts inherit this advantage. Modern marine charts still use Mercator. The projection is also useful at street-block scale because it preserves local shapes — north points up, every building is correctly proportional to its neighbours. Web maps use Mercator for this reason: zoomed in to a city, you don't need to think about projection, the math just works.

Where Mercator failsis at the global scale, where it's asked to depict things it was never designed to depict — relative country sizes, area-based statistics, population density. For any of those use cases, an equal-area projection is the right tool.

Other projections to know

Equal-Earth is the projection used in the second map above. It was designed in 2018 by Bojan Šavrič, Tom Patterson, and Bernhard Jenny specifically as a replacement for Mercator on world maps that show area-based data. It preserves area perfectly and keeps continent shapes recognisable.

Robinsonwas National Geographic's standard from 1988 to 1998. It's a compromise projection — distortion is spread roughly evenly across the map. Not equal-area, but much better than Mercator.

Winkel-Tripel replaced Robinson at National Geographic in 1998 and remains their default. Also a compromise; slightly better balance of area, distance, and angle.

Goode Homolosineis what you see in some atlases — the map "interrupts" across the oceans, splitting Antarctica and the Pacific into multiple pieces so the continents are preserved at correct area. Ugly but mathematically honest.

AuthaGraphis a 2016 four-fold projection by Hajime Narukawa that comes close to preserving area, shape, distance, and angle simultaneously. It looks unfamiliar because Earth is unfolded onto a tetrahedron, but mathematically it's among the most honest projections ever produced.

The takeaway

Every projection lies in some way — you cannot flatten a sphere without distortion. The Theorema Egregium (Gauss, 1827) proves this rigorously: no projection can preserve both area and angle simultaneously.

The right question isn't "is this projection true?" The right question is "what is this projection preserving, and is that what I care about?" For comparing country and continent sizes, use an equal-area projection. For navigation, use Mercator. For a balanced global view, Winkel-Tripel or Robinson.

Greenland is small. Africa is enormous. Russia is large but only 56% the size of Africa. Mexico is bigger than Alaska. These are mathematically settled facts, but the Mercator projection has spent 450 years convincing several generations otherwise.

Related on SimpleMapLab

• What is a Map Projection? A complete visual guide — the pillar article for the Map Projections cluster. Six projections (Mercator, Equirectangular, Equal-Earth, Orthographic, Polar Azimuthal Equal-Area, Albers Conic) rendered side-by-side with Tissot indicatrices. The theory; this article is the worked example.
• Size Comparisons cluster — 23 articles comparing countries, US states, and continents using equal-area overlay maps. The Mercator distortion problem is exactly what these articles correct.
• USA vs Africa — Africa is 3 times larger than the contiguous US.
• Greenland vs USA — Greenland fits inside the contiguous US 4.5 times.
• Equator tool, Tropic of Cancer, Tropic of Capricorn, Arctic Circle, Antarctic Circle, Prime Meridian, and International Date Line — the seven Geographic Lines tools that visualise the latitude and longitude framework projections are built on.

Methodology

Country areas come from the CIA World Factbook (land area excluding inland water) cross-checked against UN Statistics Division figures. Africa's continental area (30.37 million km² / 11.72 million sq mi) is from the UN cartographic boundary file.

Centroid latitudes are approximate population-weighted centroids — close enough for the scale-factor calculation. Mercator area inflation is computed as (1/cos(centroidLat))², which is the standard mathematical result for the cylindrical conformal projection.

Both maps on this page are rendered server-side using d3-geo via SimpleMapLab's lib/svg-map.ts renderer. Country borders are from the Natural Earth 1:50m countries dataset. The Mercator map is clipped at ±85.0511° (the Web Mercator standard). The Equal-Earth map uses the default d3.geoEqualEarth projection.

Frequently asked questions

Last reviewed: 21 May 2026. Maintained by the SimpleMapLab editorial team. Corrections welcome at hello@simplemaplab.com.