Hainan is 1.23× the size of Alagoas

Hainan (province of China) covers about 33,800 km² (13,100 mi²) and Alagoas (state of Brazil) about 27,600 km² (10,700 mi²). Below, both outlines are drawn at one scale and centred on each other.

33,800km²Hainan
27,600km²Alagoas

100 km

Hainan
Alagoas

What fits

Alagoas is 82% of the size of Hainan.
Hainan is larger by 6,220 km² (2,400 mi²), which is 23% of the area of Alagoas.
Measured in Belgiums: Hainan is about 1.10, Alagoas about 0.90.

How they differ

Hainan also has the larger population: 10.1 million against 3.1 million, 3.22× as many people.
Per square kilometre that is 298 in Hainan against 113 in Alagoas: Hainan is 2.63× as densely populated.
Their centres are about 16,200 km apart.
Together Hainan and Alagoas cover 61,500 km², close to the size of Latvia (64,600 km², 5.1% bigger).
The gap between them, 6,220 km², is about the size of Palestine (6,070 km²).
At Alagoas's density, Hainan would have 3.8 million people (it has 10.1 million). At Hainan's density, Alagoas would have 8.2 million (it has 3.1 million).
Hainan's centre is 28.7° of latitude, about 3,190 km, farther north than Alagoas's.
Hainan is the 28th largest of the 31 provinces and regions of China and covers 0.4% of its area; it is the 15th most densely populated of them.
Alagoas is the 25th largest of the 27 states and districts of Brazil and covers 0.3% of its area; it is the 4th most densely populated of them.
Hainan lies about 29° of latitude (roughly 3,190 km) north of Alagoas, on the other side of the equator.
Shared out evenly, each person in Hainan would have about 3,360 m² and each person in Alagoas about 8,830 m².
Laid side by side, Hainan and Alagoas would cover 61,500 km², 95% of the size of Latvia.
Together they have 13.2 million people, 96% as many people as Burundi.

Side by side

	Hainan	Alagoas
Is a	ProvinceChina	StateBrazil
Area, measured	33,800 km²13,100 mi²	27,600 km²10,700 mi²
Official area	33,900 km²Wikidata	27,800 km²Wikidata
Rank by area	28th of 31in China	25th of 27in Brazil
Population	10.1 millionWikidata, 2020	3.1 millionWikidata, 2022
Rank by population	28th of 31in China	19th of 27in Brazil
Density	298 per km²	113 per km²
Capital	Haikou	Maceió
Latitude range	18°N to 20°N	11°S to 9°S

Population: Wikidata 2020 and Wikidata 2022. Official figures: Wikidata (CC0).

Wikidata's official figure of 33,900 km² agrees with our measured area of 33,800 km², to within 2%.
Wikidata's official figure of 27,800 km² agrees with our measured area of 27,600 km², to within 2%.

Similar in size to Hainan

Similar in size to Alagoas

More comparisons

Sources and method

Outlines: Natural Earth, 1:10m Admin 1 - States, Provinces, public domain
Boundary: De facto, as drawn by Natural Earth. A region is drawn whole, every island included; a country is its main territory.
Area: Measured on the WGS84 ellipsoid from the full-detail outlines, shown rounded.
Drawing: Each outline is projected with an equal-area projection centred on its own centroid, so areas stay true and the two can be laid over each other.
Data built: 2026-11-12

Full method