Samsung PN51E6500EFXZA - Manual (Page 431)

8. Press the right arrow button on your
remote. The Unit pop-up appears.
9. Select your preferred units. The
selected units will be applied
throughout the Fitness app. Move to
the right again. The Height pop-up
appears.
10. Enter your height. This will be used
to calculate your body mass index
(BMI). Move to the right again. The
Weight pop-up appears.