DexaFit Atlanta provides DXA body composition (including bodyfat percentage). You can also get V02 testing (a measure of your cardiovascular fitness), and Metabolic Testing (a measure of how many calories your body burns).
They are located in Sandy Springs just north of the Perimeter , close to the Perimeter Mall and 400.
DEXA Body Composition Scan $150
VO2 Max Test $150
Resting Metabolic Rate $150