Danny ... here's the conversion site I used :
GPS Coordinate Converter, Maps and Info
But, I "had" to use it back a few years ago, because the KDFWR Fish Attractor site only gave one version of GPS coordinate readings ... DDM
Now they offer 3 different versions : GPS - DMS - DDM
I had to use the conversion site because my Lowrance Elite 5DSI would only accept the "GPS" version numbers of the conversion site. If I put the DDM numbers in my unit, my waypoints were in the desert somewhere in the Middle East :banghead :Rofl (not all the numbers would fit, so I left off the last digit, thinking it was measuring "inches" ... because I didn't know what I was doing, never having had a unit that had GPS capability)
Danny ... here's the conversion site I used : GPS Coordinate Converter, Maps and Info