Latitude and Longitude

Latitude and longitude form a grid that covers the entire planet, letting us describe any location with just two numbers. It is a system that has guided sailors, pilots, explorers, and everyday travellers for centuries, and today it powers every smartphone map and navigation app you use. Once you understand how the two values work together, reading coordinates anywhere in the world becomes second nature.

The beauty of this system is its universality. A coordinate pair means the same thing in every country and every language, which is why it remains the backbone of modern mapping and location sharing. There are no translations to worry about and no local conventions to learn — just two numbers that point to exactly one place on Earth.

What Is Latitude?

Latitude lines run horizontally (east–west) and measure distance north or south of the equator. The equator is 0°, the North Pole is +90°, and the South Pole is −90°. These lines are also called parallels because they run parallel to one another and never meet. Each degree of latitude represents roughly 111 kilometres on the ground, so latitude gives you a quick sense of how far north or south a place sits.

What Is Longitude?

Longitude lines run vertically (north–south) and measure distance east or west of the prime meridian in Greenwich, London. Values range from 0° to +180° east and −180° west. These lines are known as meridians, and unlike parallels they converge at the poles. Because the Earth rotates, longitude is also closely tied to time zones — every 15° of longitude corresponds to about one hour of time difference.

Reading a Coordinate Pair

Coordinates are always written latitude first, then longitude — for example 51.5074, -0.1278 is London. Positive latitude is north, negative is south; positive longitude is east, negative is west. Getting the order right matters: swapping the two numbers can place you in the wrong hemisphere entirely.

• Decimal degrees: 40.7128, -74.0060 (compact and app-friendly).
• Degrees-minutes-seconds: 40°42'46"N 74°00'22"W (common on charts).
• Sign vs. letter: a negative longitude and a "W" mean the same thing.

Degrees, Minutes, and Seconds

The older DMS notation divides each degree into 60 minutes, and each minute into 60 seconds, much like a clock. This can feel fiddly at first, but it maps neatly onto decimal degrees. Here is how to think about the breakdown:

1. A degree is the largest unit and covers a wide band of the globe.
2. A minute is one-sixtieth of a degree, roughly 1.85 kilometres of latitude.
3. A second is one-sixtieth of a minute, around 31 metres — precise enough for a building.

Most apps prefer decimal degrees today, but nautical charts, aviation, and surveying still lean on DMS, so it pays to recognise both.

Why It Matters in Daily Life

You rely on latitude and longitude far more often than you might realise. Ride-hailing apps pinpoint your pickup, delivery services find your door, weather forecasts localise to your exact position, and photos taken on your phone are quietly tagged with coordinates. Understanding the numbers behind these features helps you troubleshoot when a map sends you to the wrong place and lets you share locations with confidence.

See It In Action

Open the GPS coordinates finder and click the map to watch latitude and longitude update live as you move the pin. It is the fastest way to build an intuition for how the grid works. When you are ready, find your own coordinates now and see exactly where you stand on the global grid.

Frequently Asked Questions

Which comes first, latitude or longitude?

Latitude is always written first, longitude second. This order is a global convention, and following it ensures your coordinates point to the intended place rather than its mirror in a different hemisphere.

What do the positive and negative signs mean?

A positive latitude is north of the equator and a negative one is south. A positive longitude is east of the prime meridian and a negative one is west. The signs replace the N, S, E, and W letters.

How far apart is one degree of latitude?

Roughly 111 kilometres, and this stays fairly constant everywhere. Longitude degrees, by contrast, shrink toward the poles because the meridians converge, so their real-world spacing depends on how far north or south you are.

See also Local Atual for finding your current location and IP address lookup tools.

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