Body Fat Calipers-Featured NPTI Florida Fitness item of the week. How to use skin fold calipers: To use a body fat caliper, you can follow these steps: Pinch the skin: Pinch the skin and fat together, pulling it away from the muscle. Position the caliper: Place the caliper about 1 cm above or below the pinch. Take the measurement: Read the measurement from the caliper dial. Repeat: Take two or three measurements at each site. Calculate your body fat percentage: Use a formula to calculate your bo