Bay of Bengal at a glance
- 2,608 maverage depth
- 2,964 mmedian depth
- 4,724 mmaximum depth
- 2 million km²water area
Bay of Bengal is a bay. Inside its outline the GEBCO grid has about 2 million km² of water, with an average depth of about 2,608 m (the middle value is 2,964 m) and a maximum of 4,724 m, found at 6.88° N, 92.09° E.
Open the map at the deepest cell and tap to read the depth.
How deep is each part of the Bay of Bengal?
The bar splits the Bay of Bengal's water by depth. Each colour is a depth band, and the shares add up to 100%.
- 0 to 200 m: 9.7%
- 200 to 1,000 m: 3%
- 1,000 to 4,000 m: 86.6%
- 4,000 to 6,000 m: 0.6%
- below 6,000 m: 0%
Named features near the deepest point: Ninety East Ridge (1,123 km), Sunda Trench (2,752 km), Reed Tablemount (2,760 km), Carlsberg Ridge (2,968 km).
The Bay of Bengal if sea level dropped
The slider on the map lowers the sea in steps. This table shows how much of the Bay of Bengal's water would be land at each step.
| Sea level lowered by | Becomes land | Share of its water |
|---|---|---|
| 10 m | 24,458 km² | 1.2% |
| 20 m | 66,267 km² | 3.3% |
| 50 m | 120,845 km² | 5.9% |
| 80 m | 151,417 km² | 7.4% |
| 120 m | 175,897 km² | 8.7% |
| 200 m | 198,103 km² | 9.7% |
| 500 m | 223,419 km² | 11% |
| 1,000 m | 259,567 km² | 12.8% |
| 2,000 m | 426,341 km² | 21% |
| 3,000 m | 1.1 million km² | 51.8% |
| 4,000 m | 2 million km² | 99.4% |
| 6,000 m | 2 million km² | 100% |
A simple bathtub model: it lowers the sea everywhere by the same amount and does not simulate how water would really drain.
Nearby seas
- Andaman Sea average depth about 1,071 m
- Laccadive Sea average depth about 1,956 m
- Gulf of Thailand average depth about 42 m
- Gulf of Tonkin average depth about 36 m
- Arabian Sea average depth about 3,313 m
- South China Sea average depth about 1,354 m
Nearest by the centre of each outline. All oceans and seas
Frequently asked questions
How deep is the Bay of Bengal?
On average about 2,608 m in the GEBCO grid (the middle value is 2,964 m). The deepest cell inside its outline is 4,724 m, at 6.88° N, 92.09° E.
How big is the Bay of Bengal?
About 2 million km² of water inside its Natural Earth outline, counted from the grid cells that are below sea level.
How much of the Bay of Bengal would be land if sea level dropped?
With the sea 10 m lower, about 24,458 km² (1.2%) of its water would be land. At 6,000 m lower, 100% would be. This is a simple bathtub model that lowers the sea evenly everywhere.
Data: depths from the GEBCO_2026 grid, statistics worked out inside the Natural Earth outline of the bay. See data sources and licences. The GEBCO Grid should NOT be used for navigation or for any other purpose involving safety at sea.