Antipode of Portsmouth, United Kingdom
The opposite side of the world to Portsmouth is Portobello, Otago, New Zealand.
Portsmouth
United Kingdom
Continent: Europe
Coordinates: 50.799, -1.091
Antipodal point
South Pacific Ocean
Exact location on the other side of the world
Coordinates: -50.799, 178.909
Portobello
New Zealand
Portobello is the closest city to Portsmouth's antipodal point (822 km).
The antipodal city to Portsmouth is Portobello. This means that, among all the populated locations in the world, the farthest city from Portsmouth is Portobello.
The distance from Portsmouth to Portobello is about 19,000 kilometers. A direct flight would take around 21 hours, but there aren't commercial routes between these cities.
Cities on the other side of the world of Portsmouth
This table contains the populated locations that are closest to Portsmouth's antipode. These are the farthest cities in the world from Portsmouth.
| City | Country | Distance from antipode | Coordinates |
|---|---|---|---|
| Portobello, Otago | New Zealand | 822 km | (-45.850, 170.650) |
| Dunedin, Otago | New Zealand | 829 km | (-45.874, 170.504) |
| Waitati, Otago | New Zealand | 835 km | (-45.750, 170.567) |
| Waitangi, Chatham Islands | New Zealand | 834 km | (-43.954, -176.560) |
| Kaitangata, Otago | New Zealand | 836 km | (-46.275, 169.850) |
| Papatowai, Otago | New Zealand | 839 km | (-46.561, 169.471) |
| Milton, Otago | New Zealand | 840 km | (-46.121, 169.969) |
| Outram, Otago | New Zealand | 844 km | (-45.867, 170.233) |
| Balclutha, Otago | New Zealand | 845 km | (-46.234, 169.750) |
| Oamaru, Otago | New Zealand | 867 km | (-45.098, 170.971) |
Portsmouth, United Kingdom
Local time:
Coordinates: 50.799° N 1.0913° W
Portobello, New Zealand
Local time:
Coordinates: 45.85° S 170.65° E
How to calculate the antipodal point?
The antipode can be calculated by understanding the geographic coordinates and applying simple formulas. We will use the following variables:
- LatO: Latitude at the origin point.
- LngO: Longitude at the origin point.
- LatA: Latitude at the antipodal point.
- LngA: Longitude at the antipodal point.
Step 1: Obtain the geographic coordinates of Portsmouth
The DMS coordinates are: 50°47'56.4'' N 1°5'28.5'' W.
Calculations are easier by using the decimal format, hence:
LatO = 50.79899°
LngO = -1.09125°
Step 2: Calculate the latitude
LatA = - LatO = -50.79899°
Since the latitude is positive (north direction), the antipode must be negative (south direction).
Step 3: Calculate the longitude
LngA = LngO ± 180° = -1.09125 + 180° = 178.90875°
Since the longitude is negative, we sum 180° to ensure the final value lies between (-180, 180). If it were the other way around, we would subtract 180° for the same reason.
Result:
The antipode of Portsmouth is located on coordinates: (LatA, LngA) = (-50.79899, 178.90875)
In DMS format: 50°47'56.4'' N 1°5'28.5'' W.
