With a Calculator

• 1). Divide the minute part of the latitude value by 60. For example, if the latitude is 55 degrees, 12 minutes, 36 seconds, then 12 minutes / 60 = 0.2.
  
  
• 2). Divide the second part of the latitude value by 3600. In our example, it will be 36 seconds / 3600 = 0.01.
  
  
• 3). Add up the degree part of the latitude and the numbers obtained in steps 1 and 2 to convert the latitude into degrees. In our example, the latitude is 55 + 0.2 + 0.01 = 55.21 degrees.
  
  

Using Online Converter

• 1). Open a web browser on your computer and navigate to the Latitude/Longitude Conversions web page (see Resources).
  
  
• 2). Type the latitude value in the fields "Enter Degrees Minutes Seconds latitude" and then click on the button "Convert to Decimal." For example, enter the following latitude: 12 degrees 31 minutes, 26 seconds.
  
  
• 3). Read the latitude in degrees in the field "Results." In our example the latitude is 12.523889 degrees.