Many handheld GPS units give distances in kilometers and miles. Depending on the
resolution, converting these values to meters and feet can result in a very low
accuracy. For example, a GPS unit gives the distance out to 0.01 kilometer or
0.01 mile. This corresponds to an accuracy of only 10 meters or 53 feet.
Use this tool to calculate the great circle distance between two GPS points. The
points can be in decimal degrees (dd.ddddd), degrees and minutes (dd mm.mmmmm)
or degrees, minutes and seconds (dd mm ss.sssss). The distance calculation will
be given in meters, feet, kilometers and miles.