Antipode of Philadelphia, United States

The opposite side of the world to Philadelphia is Augusta, Western Australia, Australia.


United States

Continent: America

Coordinates: 39.952, -75.164

Antipodal point

Opposite side in the world

Continent: America

Coordinates: -39.952, 104.836



Augusta is the closest city to Philadelphia's antipodal point (1,109 km).

The antipodal city to Philadelphia is Augusta. This means that, among all the populated locations in the world, the farthest city from Philadelphia is Augusta.

The distance from Philadelphia to Augusta 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 Philadelphia

This table contains the populated locations that are closest to Philadelphia's antipode. These are the farthest cities in the world from Philadelphia.

City Country Distance from antipode Coordinates
Augusta, WA Australia 1,109 km (-34.316, 115.159)
Gnarabup, WA Australia 1,119 km (-33.993, 114.996)
Margaret River, WA Australia 1,128 km (-33.955, 115.076)
Cowaramup, WA Australia 1,137 km (-33.850, 115.104)
Yallingup, WA Australia 1,147 km (-33.646, 115.035)
Dunsborough, WA Australia 1,154 km (-33.615, 115.104)
Quindalup, WA Australia 1,156 km (-33.636, 115.149)
Marybrook, WA Australia 1,158 km (-33.653, 115.204)
Vasse, WA Australia 1,160 km (-33.693, 115.268)
Abbey, WA Australia 1,161 km (-33.664, 115.256)

Philadelphia, United States

Local time:

Coordinates: 39.9523° N 75.1638° W

Augusta, Australia

Local time:

Coordinates: 34.3157° S 115.1592° 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 Philadelphia

The DMS coordinates are: 39°57'8.4'' N 75°9'49.6'' W.

Calculations are easier by using the decimal format, hence:

LatO = 39.95233°

LngO = -75.16379°

Step 2: Calculate the latitude

LatA = - LatO = -39.95233°

Since the latitude is positive (north direction), the antipode must be negative (south direction).

Step 3: Calculate the longitude

LngA = LngO ± 180° = -75.16379 + 180° = 104.83621°

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.


The antipode of Philadelphia is located on coordinates: (LatA, LngA) = (-39.95233, 104.83621)

In DMS format: 39°57'8.4'' N 75°9'49.6'' W.

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