Decimal to DMS Converter - Lat Long to DMS

Convert decimal latitude and longitude to Degrees, Minutes, and Seconds (DMS) online for free with this lat long to DMS converter. Built for GIS professionals, surveyors, and navigators, it automatically detects N/S and E/W directions and delivers precise coordinates. Enter your decimal values and get accurate DMS results in seconds.

Decimal degrees (DD) are compact and easy for computers, but the traditional DMS notation (like 48°51'30"N) is still standard on charts, plats, and in aviation and marine navigation. This converter bridges the two. To convert in the other direction, use the DMS to Decimal Degrees tool.

Why Convert Lat Long to DMS?

A decimal to DMS converter is essential whenever human-readable coordinates matter. Mapping APIs, GPS firmware, and geocoding services all speak decimal degrees internally, but aviation charts, marine navigation, survey plats, legal property descriptions, and most printed maps still use the traditional degrees–minutes–seconds notation. Converting between them by hand is error-prone, especially with negative values that encode south and west hemispheres.

This lat long to DMS tool handles every edge case automatically: it splits the decimal value into whole degrees, minutes, and seconds, applies the correct N/S/E/W suffix, and preserves full precision. Because the conversion runs entirely in your browser, you can batch-convert thousands of coordinates from a spreadsheet paste without sending any location data to a third-party server.

Live Example

A decimal coordinate splits into whole degrees, minutes, and seconds with the correct hemisphere:

Input (decimal)

Latitude:  48.8584
Longitude: 2.2945

Output (DMS)

48° 51' 30.24" N
2° 17' 40.20" E

How to Convert Lat Long to Degrees Minutes Seconds

Enter Latitude: Type your decimal latitude value (between -90 and 90).
Enter Longitude: Type your decimal longitude value (between -180 and 180).
Convert: Click Convert to calculate the DMS coordinates with the correct direction.
Copy or Download: Copy the result to your clipboard or download it as a text file.

Key Features

✅ Convert decimal degrees to DMS format
✅ Support for both latitude and longitude
✅ Automatic direction detection (N/S for latitude, E/W for longitude)
✅ High-precision seconds with two decimal places
✅ Copy converted coordinates to clipboard
✅ Download coordinates as a text file
✅ Input validation for valid coordinate ranges

Common Use Cases

Land Surveying: Express site coordinates in the traditional DMS format used on plats and surveys.
Navigation: Convert GPS decimals to DMS for charts, aviation, and marine navigation.
GIS and Mapping: Prepare coordinates for mapping software that expects DMS notation.
Education: Learn and verify decimal-to-DMS conversions for geography and math coursework.

Benefits of Using Our Tool

✅ Free to use with no registration required
✅ Instant, accurate conversions
✅ Automatic hemisphere direction detection
✅ Copy and download results in one click
✅ All processing in your browser—your data stays private

About Coordinate Formats

Latitude and longitude pinpoint a spot on Earth. Decimal degrees (DD) express a coordinate as a single signed number — latitude runs from −90 at the South Pole to +90 at the North Pole, longitude from −180 to +180 west to east. DMS (degrees, minutes, seconds) breaks each degree into 60 minutes and each minute into 60 seconds, the way we divide an hour, giving the familiar 48°51'30"N form. A third style, degrees and decimal minutes (DM) (48°51.504'N), is common in marine GPS.

To convert decimal degrees to DMS: the whole number is the degrees; multiply the fraction by 60 to get minutes; multiply that fraction by 60 again to get seconds. The hemisphere comes from the sign — positive latitude is north, positive longitude is east. Precision matters: each decimal place of latitude is about 11 metres at the equator, so five decimals (≈1.1 m) is enough for most street-level mapping. The converter carries two decimals of seconds so no meaningful precision is lost.

DMS remains the language of printed charts, legal land descriptions, and aviation, while decimal degrees dominate digital mapping, geocoding APIs, and databases. To reverse the conversion, use the DMS to Decimal Degrees tool.

Common Errors and How to Fix Them

Wrong hemisphere shown: Signs determine direction. Negative latitude is south, negative longitude is west. Don't type the letter before converting — use a signed number.
Latitude/longitude swapped: Latitude is always ±90 (N/S), longitude ±180 (E/W). A value over 90 in the latitude field is an error.
Minutes reach 60: That indicates a rounding carry issue. A correct conversion rolls 60 seconds into a minute and 60 minutes into a degree.
Lost precision: Round seconds to two decimals at most. More decimals imply false accuracy.

Frequently Asked Questions

1What is DMS format?

DMS (Degrees, Minutes, Seconds) is a format for expressing geographic coordinates. It divides degrees into 60 minutes, and each minute into 60 seconds, providing a more precise way to represent locations.

2Why convert decimal degrees to DMS?

Converting to DMS format is useful for traditional navigation, surveying, and mapping applications where coordinates are expressed in degrees, minutes, and seconds rather than decimal format.

3How do I convert decimal degrees to DMS?

Enter your decimal latitude and longitude, click Convert, and the tool returns the DMS values with the correct N/S and E/W directions automatically.

4What are the valid latitude and longitude ranges?

Latitude must be between -90 and 90, and longitude must be between -180 and 180 degrees. The tool validates your input before converting.

5How precise are the converted DMS coordinates?

The converter calculates seconds to two decimal places, providing high precision suitable for surveying, navigation, and mapping work.

6Can I copy or download the DMS coordinates?

Yes, you can copy the converted coordinates to your clipboard or download them as a text file for use in other applications.