Among affordable methods for measuring body fat percentage, using a skinfold caliper is still the best and the four spot formula by Durnin and Womersley is very accurate for most people.
1. Measure skinfold in millimeters as indicated on the pictures and enter values.
2. For further instructions see our guide "How to measure body fat with a skinfold caliper"
The Durnin & Womersley calculation should be considered valid for people between 17 and 68 years old.
Durnin JVGA, Womersley J. Body fat assessed from total body density and its estimation from skinfold thickness: measurements on 481 men and women aged from 16 to 72 years. Br J Nutrition. 1974; 32: 77-97.
Siri WE. The gross composition of the body. pages 239-280. IN: Lawrence JH, Tobias CA (editors). Advances in Biological and Medical Physics. Academic Press, Inc. Advances in Biological and Medical Physics. 1956; 4: 239-280.