I found answer for converting UTM to LatLong here
(lat,lng) = transform(easting, northing, zone)
Most answers I search does not include calculations to compute altitude from down. But, I want to convert down measurements to altitude, how do I do something like:
(lat, lng, alt) = transform(easting, northing, down, zone)
(? , ? , ? ) = transform(5735847.026821, 619997.428877, -116.869707, "30U")