Dr. Sheikh believes it depends on your reasoning, “If someone is following a diet or exercise plan and is following their weight, it can be useful to do it every few days.” However, if your goals are more long-term, conducting monthly or more intermittent readings also work. She continues, “It is best to take it in the morning before eating and without clothes so it is the most accurate. It should not vary too much throughout the day but [your weight] may be a little more right after a meal.”