Body Fat Percentage Calculator
Unit of Measurement:
Gender:
Weight:
Age:
  Chest

The chest measurement is taken as a diagonal fold, halfway between the anterior axillary line and nipple

  Abdominal

The abdominal measurement is taken as a vertical fold, 2cm to the right side of the umbilicus

  Thigh

The thigh measurement is taken as a vertical fold, midway between the proximal border of the patella and the inguinal crease

  Tricep

The tricep measurement is taken as a vertical fold, midway between the acromion and olecranon processes

  Suprailiac

The suprailiac measurement is taken as a diagonal fold, immediately superior to the iliac crest

  Subscapular

The subscapular measurement is taken as a diagonal fold, directly below the inferior angle of the scapula

  Mid-Axillary

The mid-axillary measurement is taken as a vertical fold, on the mid-axillary line at the level of the xiphoid process of the sternum

Body Fat Percentage:
This calculator is based on the Jackson-Pollock 7-Site Caliper Method
Although this method is not as accurate as the DEXA scan, it is a good way to estimate your body fat percentage. [Source]
For more visual help on how to take the measurements, please refer to this image
Credit: unit-conversion.info