Hainan is 1.07× the size of Lake Baikal

Hainan (province) covers about 33,800 km² (13,100 mi²) and Lake Baikal (lake) about 31,500 km² (12,200 mi²). Below, both outlines are drawn at one scale and centred on each other. The Lake Baikal outline is Natural Earth’s, checked against the published area.

33,800km²Hainan
31,500km²Lake Baikal

100 km

Hainan
Lake Baikal

What fits

Lake Baikal is 93% of the size of Hainan.
Hainan is larger by 2,290 km² (885 mi²), which is 7.3% of the area of Lake Baikal.
Measured in Belgiums: Hainan is about 1.10, Lake Baikal about 1.03.

How they differ

Their centres are about 3,810 km apart.
On a standard web map Lake Baikal looks larger than Hainan: Hainan at 19°N is drawn about 1.1× too large and Lake Baikal at 53°N about 2.8×, so the map shows Lake Baikal as 2.34× the size of Hainan, when Hainan is 1.07× the size of Lake Baikal.
Together Hainan and Lake Baikal cover 65,400 km², close to the size of Lithuania (64,900 km², 0.7% smaller).
The gap between them, 2,290 km², is about the size of Luxembourg (2,610 km²).
Lake Baikal's centre is 34.2° of latitude, about 3,800 km, farther north than Hainan's.
Hainan is a province of China; it is not drawn with its waters removed, and its measured area is the Natural Earth outline's.
Lake Baikal is a lake and ranks 7th of the 104 lakes on sizeversus by area.
Laid out flat, Hainan stretches about 222 km north to south and 254 km east to west; Lake Baikal about 478 km by 416 km.
Poured over Hainan, the 23,615 km³ that Wikidata records for Lake Baikal would stand 698 m deep.
Wikidata’s published figure of 31,700 km² agrees with our measured 31,500 km², to within 2%.

Who wins on what

Measure	Winner	By
Larger area	Hainan	1.07×
Farther north	Lake Baikal	34.2° of latitude
Stretched more on a web map	Lake Baikal	2.8× against 1.1×

Both against the same yardsticks

Yardstick	Hainan	Lake Baikal
Belgium 30,700 km²	1.10×	1.03×
United Kingdom 244,000 km²	0.14×	0.13×
Germany 358,000 km²	0.09×	0.09×
Japan 374,000 km²	0.09×	0.08×
France 548,000 km²	0.06×	0.06×
India 3,151,000 km²	0.01×	0.01×
Brazil 8,473,000 km²	1 in 250	1 in 269
United States 9,447,000 km²	1 in 279	1 in 299
Russia 16,980,000 km²	1 in 502	1 in 538

Each figure is the place's area divided by the yardstick's.

Side by side

	Hainan	Lake Baikal
Is a	ProvinceChina	Lakelake on sizeversus
Area, measured	33,800 km²13,100 mi²	31,500 km²12,200 mi²
Area, published	33,900 km²Wikidata	31,700 km²Wikidata
Rank by area	–	7th of 104lakes
Greatest depth	–	1,642 mWikidata
Volume	–	23,615 km³
Latitude range	18°N to 20°N	51°N to 56°N
On the shore	–	1 on the shore

Published figures: Wikidata (CC0). A lake or a sea has no legal boundary: the measured area is that of Natural Earth’s outline, and it is shown beside the published one.

Natural Earth’s outlines of Russia contain or lie within 4 km of the outline of Lake Baikal. That is what its geometry says, and it is not a statement about who owns the water or where any border runs in it.

Similar in size to Hainan

Similar in size to Lake Baikal

More comparisons

Sources and method

Outlines: Lakes and seas: Natural Earth 1:10m physical vectors (public domain), kept only where the measured area is within 10% of the published one. Countries and regions: Natural Earth, 1:10m Admin 0 and Admin 1, public domain.
Boundary: De facto, as drawn by Natural Earth. A lake or a sea has no legal boundary of its own; the outline is a cartographic one.
Area: Measured on the WGS84 ellipsoid from the full-detail outlines, shown rounded. The published figure comes from Wikidata (CC0), fetched 2026-11-11, and is shown beside the measured one.
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: 2026-11-11

Full method