Heilongjiang is 1.01× the size of Red Sea

Heilongjiang (province) covers about 452,000 km² (175,000 mi²) and the Red Sea (sea) about 446,000 km² (172,000 mi²). Below, both outlines are drawn at one scale and centred on each other. The Red Sea outline is Natural Earth’s, checked against the published area.

452,000km²Heilongjiang
446,000km²Red Sea

200 km

Heilongjiang
Red Sea

What fits

Red Sea is 99% of the size of Heilongjiang.
Heilongjiang is larger by 6,060 km² (2,340 mi²), which is 1.4% of the area of Red Sea.
Measured in Belgiums: Heilongjiang is about 14.7, Red Sea about 14.5.

How they differ

Their centres are about 8,290 km apart.
A standard web map misstates the comparison: Heilongjiang at 48°N is drawn about 2.2× too large and Red Sea at 20°N about 1.1×, so the map shows Heilongjiang as 1.98× the size of Red Sea instead of 1.01×.
Together Heilongjiang and Red Sea cover 898,000 km², close to the size of Nigeria (907,000 km², 1.0% bigger).
The gap between them, 6,060 km², is about the size of Palestine (6,070 km²).
Heilongjiang's centre is 27.6° of latitude, about 3,070 km, farther north than Red Sea's.
Heilongjiang is a province of China; it is not drawn with its waters removed, and its measured area is the Natural Earth outline's.
The Red Sea is a sea and ranks 13th of the 42 seas on sizeversus by area.
Laid out flat, Heilongjiang stretches about 1,130 km north to south and 968 km east to west; the Red Sea about 1,740 km by 1,000 km.
Wikidata’s published figure of 446,000 km² agrees with our measured 446,000 km², to within 2%.

Who wins on what

Measure	Winner	By
Larger area	Heilongjiang	1.01×
Farther north	Heilongjiang	27.6° of latitude
Stretched more on a web map	Heilongjiang	2.2× against 1.1×

Both against the same yardsticks

Yardstick	Heilongjiang	Red Sea
Belgium 30,700 km²	14.7×	14.5×
United Kingdom 244,000 km²	1.86×	1.83×
Germany 358,000 km²	1.26×	1.25×
Japan 374,000 km²	1.21×	1.19×
France 548,000 km²	0.83×	0.81×
India 3,151,000 km²	0.14×	0.14×
Brazil 8,473,000 km²	0.05×	0.05×
United States 9,447,000 km²	0.05×	0.05×
Russia 16,980,000 km²	0.03×	0.03×

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

Side by side

	Heilongjiang	Red Sea
Is a	ProvinceChina	Seasea on sizeversus
Area, measured	452,000 km²175,000 mi²	446,000 km²172,000 mi²
Area, published	455,000 km²Wikidata	446,000 km²Wikidata
Rank by area	–	13th of 42seas
Greatest depth	–	3,040 mWikidata
Latitude range	43°N to 54°N	12°N to 28°N
On the shore	–	6 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 Saudi Arabia, Egypt, Eritrea, Yemen, Sudan and Djibouti lie within 25 km of the outline of the Red Sea. 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 Heilongjiang

Similar in size to Red Sea

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