The Slim Guide caliper is the most widely used skinfold caliper in the world. Easy to use at home, in the clinic, or at the gym. It is the only low-cost skinfold caliper accurate enough for professional use. Includes a free plan subscription to AnthroMetrix software, which is a web based body fat software. With AnthroMetrix you can create profiles, save pictures, create goals, and calculate body fat percentage according to multiple equations. Instructions for accessing the software are included in the multilingual color instruction manual (English, Spanish, German, French, and Italian) ANTHROFLEX BMI TAPE MEASURE: Monitor and assess changes to your body, and use the calculator function to quickly determine BMI and obesity risk. To calculate BMI 1. Using the dial, line up your weight (in kilograms) with your height (in meters). 2. See BMI reading in window to determine if you are underweight, healthy, or overweight, or very overweight.