For home testing, the easiest method is a body composition scale that uses a low-level electrical current (you won’t feel a thing) to determine body fat; try out . Accuracy can vary, so don’t obsess over the number; instead, test yourself once a month and focus on changes. If your body fat is too high and you start eating right and exercising, you should see that number go down.   Time of day, hydration level, menstrual cycle, eating, and exercising can all affect the measurement, so for the most accurate results, test yourself under the same circumstances, such as in the morning, before breakfast or exercise, and not during your period.