How much bigger is Africa than Greenland, really?

Africa is about 14 times larger than Greenland. Africa covers approximately 11.7 million square miles (30.4 million km²); Greenland covers approximately 836,000 square miles (2.16 million km²). The two are not remotely close in size — but on a Mercator projection Greenland looks slightly larger than Africa, which is the inverse of reality by an enormous factor.

Why does the Mercator projection make Greenland look so big?

Mercator was designed in 1569 by Gerardus Mercator for marine navigation. It preserves angles, which means a straight line on the map corresponds to a constant compass bearing — vital for sailors. To achieve that property, the projection stretches the map vertically as you move away from the equator, by a factor of 1/cos(latitude). At Greenland's mean latitude of about 72°N, the scale factor is roughly 3.2× linear, which means areas inflate by 3.2² ≈ 10×. Africa straddles the equator (centroid near 0°), where the scale factor is 1× — no inflation at all.

Is the Mercator projection wrong?

No, it's not wrong — it's the right tool for the wrong job. Mercator perfectly preserves angles and compass bearings, which is exactly what nautical and aeronautical charts need. The problem is that schools, atlases, and Google Maps used Mercator as the default world map for over a century, training generations to misperceive area. For comparing the sizes of countries or continents, you should use an equal-area projection like Equal-Earth, Robinson, or Goode Homolosine.

Why does Google Maps use Mercator?

Google Maps uses a variant called Web Mercator. It was chosen because the projection has a useful property at street level: every square block of the map is north-aligned and rectangular, regardless of zoom level. This makes tile-based rendering and rotation-free navigation simple. The trade-off is the well-known area distortion at the global scale. Google partially fixed this in 2018 by switching the fully-zoomed-out view to a globe.

What is the math behind Mercator distortion?

At latitude φ, the Mercator linear scale factor is 1/cos(φ). The area distortion factor is (1/cos(φ))². So at 0° (the equator) areas are correct. At 30° areas are inflated 1/cos²(30°) ≈ 1.33×. At 45°, 2×. At 60°, 4×. At 75°, ≈14.9×. At 80°, ≈33×. And at 85°, ≈132×. Antarctica, which extends below 75°S, becomes essentially infinite — which is why most Mercator world maps cut it off above 85°S.

Are there other projections that distort less?

Many. Equal-Earth (introduced 2018 by Šavrič, Patterson, and Jenny) preserves area while keeping continents recognisable. Robinson is a compromise projection used by National Geographic for decades. Winkel-Tripel is the current National Geographic default and balances area, distance, and shape. Goode Homolosine "interrupts" the projection across the oceans to preserve area without distorting continents. AuthaGraph is a recent four-fold projection by Hajime Narukawa that comes close to preserving multiple properties simultaneously.

Which countries are most distorted on Mercator?

High-latitude landmasses. The biggest offenders: Greenland (centroid ~72°N, inflated about 10× in area), Antarctica (75-90°S, inflated 10×–∞), Iceland (~64°N, ~5×), Russia (mean ~62°N, ~4×), Canada's northern islands (~70°N, ~9×), Scandinavia (~65°N, ~6×), and Alaska (~64°N, ~5×). All equatorial countries (Brazil, Indonesia, Kenya, Colombia) are correctly sized on Mercator — including effectively all of Africa.

Does this mean my mental map of the world is wrong?

Almost certainly. If you grew up looking at Mercator-projection wall maps or pre-2018 Google Maps, you probably believe that Greenland is much larger than it is, that Russia dwarfs Africa, that Alaska is much larger than Mexico, and that Antarctica is enormous. None of these are true. Africa is bigger than Russia. Mexico is bigger than Alaska. Antarctica is the third-largest landmass but isn't close to the size Mercator suggests.

How is the math behind the indicator built into SimpleMapLab?

Both maps on this page are server-rendered at build time using d3-geo through SimpleMapLab's shared lib/svg-map.ts renderer. The Mercator map fits a ±85° polar clip (the Web Mercator standard); the Equal-Earth map uses the standard d3.geoEqualEarth projection. Country borders come from the Natural Earth 1:50m countries dataset; both maps render the same source data through the two projections so the comparison is honest.

Where can I see more of these size comparisons?

SimpleMapLab has a full Size Comparisons cluster — 23 articles using equal-area overlay maps to compare countries, states, and continents. Examples: USA vs Europe, USA vs Africa, Greenland vs USA, India vs USA, China vs Europe, and more. Every comparison uses an equal-area projection so the visuals are honest.

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

By Marko Visic · Published May 21, 2026 · Updated Oct 1, 2026

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 short version. Africa is 11.7 million square miles. Greenland is 836,000 square miles. The Mercator projection (used on most school wall maps, atlases, and Google Maps until 2018) stretches landmasses vertically by 1/cos(latitude) — which means a country at 72°N looks 10× bigger than it actually is, while equatorial countries look correct. Greenland sits at 72°N; Africa straddles the equator. That single mathematical fact is why the two look roughly the same on most maps.

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 is tiny 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: