Earth Sandwich / City antipodes / Montréal
Antipode finder · Canada
The antipode of
Montréal.
Draw a straight line from Montréal (45.51° N, 73.59° W) through the centre of the Earth and it comes out at 45.51° S, 106.41° E, in the Indian Ocean, 1,431 km from the nearest dry land, off the coast of Australia. The other slice of an Earth sandwich would sink.
- Montréal
- 45.51° N, 73.59° W · about 40 m above sea level · 1,762,949 people
- Antipode
- 45.51° S, 106.41° E
- What is there
- The Indian Ocean; the sea floor there lies about 3,960 m below the surface
- Nearest dry land
- 1,431 km from the antipode, on the coast of Australia
- Nearest town
- Augusta, Australia · 1,449 km from the antipode
- Nearest big city
- Perth · 1,713 km from the antipode
- Sandwich verdict
- SOGGY the other slice lands in open water
- Nearest exact spot
- 2,496 km away, near Shellbrook, Canada ⇄ 477 km from Port-aux-Français, Heard Island and McDonald Islands
Can you make an Earth sandwich from Montréal?
No, not from Montréal itself. The other slice would land in the Indian Ocean, 1,431 km from the nearest dry land (Australia), where the sea floor lies about 3,960 m below the surface. Boats do not count (Sandwich Law § 1.3).
The nearest place from which an exact Earth sandwich is possible is 2,496 km from Montréal, 16 km from Shellbrook, Canada. Its other slice would go down 477 km from Port-aux-Français, Heard Island and McDonald Islands.
Montréal is on the The US & Canada ↔ the southern Indian Ocean corridor. Its guide lists where every city on both sides lands and how to make an Earth sandwich there.
How this was worked out: the antipode flips the latitude and moves the longitude by 180°. Land or sea comes from the OpenStreetMap coastline the map uses; the sandwich verdict and elevations come from the verifier's 0.2° grid (Natural Earth land, ETOPO 2022 relief); water names from Natural Earth; towns and populations from GeoNames. The city's position is GeoNames' point for it; a big city's suburbs spread tens of kilometres around that point, and the figures move with them. Generated 2026-09-29.