Decimal degrees vs DMS comes down to two ways of writing the same GPS coordinates. Decimal degrees (DD) use a single decimal number, such as 24.8607° N. DMS (degrees, minutes, seconds) splits the same value into three parts, such as 24° 51' 38.5" N.

Both formats point to the exact same spot on Earth. This guide teaches you how to read GPS coordinates in either style. It compares all three formats and walks through a full conversion example.

What are decimal degrees?

Decimal degrees (DD) write latitude and longitude as plain decimal numbers. Karachi, for example, sits at 24.8607° N, 67.0011° E. The digits before the point are whole degrees, and the digits after it add precision.

DD often replaces the letters N, S, E, and W with plus and minus signs. Positive values mean north or east, while negative values mean south or west. Sydney becomes -33.8688, 151.2093 in this signed style.

DD is the format you will meet most online. Google Maps accepts it directly in the search bar, and most GPS devices, apps, and map APIs use it too. Each extra decimal place narrows the point, with five places reaching about one meter of precision.

Reading DD is simple once you know the pattern. The number before the dot tells you the degrees. Each digit after the dot zooms in closer. There is nothing else to decode.

What is the DMS format?

DMS format explained in one sentence: it divides each degree into 60 minutes, and each minute into 60 seconds. It works like a clock, which makes it easy to remember.

Karachi in DMS is 24° 51' 38.5" N, 67° 00' 4.0" E. The ° mark means degrees, the ' mark means minutes, and the " mark means seconds. A compass letter at the end (N, S, E, W) tells you the direction.

You will find DMS on paper maps, in property deeds, and in marine and aviation settings. Older GPS units also default to it. It looks complex at first, but it is just the same coordinate cut into smaller pieces.

Decimal degrees vs DMS: all three formats compared

There is actually a third format, DDM (degrees, decimal minutes). It sits between the other two, using degrees plus decimal minutes, like 24° 51.642' N. Sailors and pilots use it often.

Here is how DD vs DMS vs DDM compare at a glance. All three examples below point to the same spot in Karachi.

Note how each format gets more exact with more digits. Five decimal places in DD, or seconds to one decimal in DMS, both land within about one meter. No format is more accurate by nature. Accuracy depends on how many digits you keep.

How to read GPS coordinates

Start by finding which format you are looking at. If you see one number with a decimal point, it is DD. If you see °, ', and " symbols, it is DMS. If you see ° and ' but no ", it is DDM.

Next, check the direction. In DD, a minus sign means south (latitude) or west (longitude). In DMS and DDM, the letter at the end does the same job: S and W are the "negative" directions.

Latitude always comes first. It measures north and south of the equator, from 0° to 90°. Longitude comes second and measures east and west, from 0° to 180°.

A common mistake is swapping the two. If a coordinate in Pakistan showed 67.0011° N, it would land in the Arctic Ocean. When a point looks wildly wrong, check the order first.

Need a coordinate first? See our guide on finding your GPS coordinates on any device.

Worked example: converting 24.8607 to DMS

Converting decimal degrees to DMS takes three quick steps. You multiply the decimal part by 60, then multiply the new decimal by 60 again.

Here is the full walk-through for 24.8607:

1. Take the whole number as degrees. The whole number is 24, so you have 24°.
2. Multiply the leftover decimal by 60. 0.8607 × 60 = 51.642. The whole number is your minutes: 51'.
3. Multiply the new leftover by 60. 0.642 × 60 = 38.52. These are your seconds: 38.52".
4. Put it together. 24.8607° becomes 24° 51' 38.52".

You can check your work by going backward. Divide the minutes by 60 and the seconds by 3600, then add: 24 + (51 ÷ 60) + (38.52 ÷ 3600) = 24.8607. The numbers match, so the conversion is correct.

If you would rather skip the math, paste any coordinate into the free converter on LocationMe. It switches between DD, DMS, and DDM instantly, with no signup needed.

How many decimal places do you need?

Not every task needs full precision. Two decimal places (about 1 km) are enough to name a city. Four places (about 11 m) find a building. Five places (about 1 m) find a door.

Sharing fewer digits is also a privacy habit. Posting two decimals online reveals your city without revealing your street. Posting five reveals the exact house.

In DMS terms, the same idea applies. Whole seconds (about 31 m) find a building, while one decimal of a second (about 3 m) finds a door. Keep the digits that match your task, and no more.

Most phone GPS readings give you five or six decimals by default. That is plenty. Keeping more digits than your device can actually measure just adds noise.

Which format should you use?

Use decimal degrees for anything digital. Google Maps, ride apps, and most websites expect DD. It is also the simplest to copy, paste, and store.

Use DMS when you are reading a paper map, a land deed, or an older navigation device. Use DDM on boats and in small aircraft, where instruments often show that style.

When in doubt, DD is the safe default. Every modern tool can read it, and converting later takes seconds. Paste any coordinate into LocationMe to see all three formats at once. For the full method, follow our guide to converting GPS coordinate formats in all six directions.

Frequently asked questions

How do I read GPS coordinates?
Find the format first (one decimal number means DD, while °, ', and " symbols mean DMS). Latitude comes before longitude. Minus signs or S and W letters mark the southern and western directions.

What is the DMS format, explained simply?
DMS splits each degree into 60 minutes and each minute into 60 seconds, like a clock. So 24° 51' 38.5" N means 24 degrees, 51 minutes, and 38.5 seconds north of the equator.

What is the difference between DD, DMS, and DDM?
DD writes the coordinate as one decimal number. DMS splits it into degrees, minutes, and seconds. DDM uses degrees plus decimal minutes. All three can describe the same point with the same accuracy.

Which is more accurate, decimal degrees or DMS?
Neither is more accurate on its own. Accuracy comes from the number of digits you keep. Five decimals in DD and one decimal of a second in DMS both reach about one meter.

How do I convert decimal degrees to DMS quickly?
Multiply the decimal part by 60 for minutes, then multiply the leftover by 60 for seconds. Or paste the coordinate into the free converter at LocationMe for an instant result.