How much weight fluctuation is normal for the human body in one day?

The normal daily weight fluctuation of a person is about 1-3kg, which is within the normal range.
Because the daily dietary composition is different, and the amount of food and water you have is not very constant, your weight will vary with a little difference. The amount of exercise also has a certain impact on your weight. It is recommended to set a fixed time every day when weighing, which can be after using the toilet in the morning, before meals, or at night. In short, it is necessary to set a fixed time for comparability.
Note:
It is recommended to fully understand the daily weight fluctuations. If the weight continues to decline, for example, the weight drops more than 10% of the original weight every month, you should pay attention to whether there are pathological factors. In addition to deliberate weight loss, you should pay attention to whether there are diabetes, hyperthyroidism, tuberculosis, tumors, and gastrointestinal diseases that will lead to weight loss.