Água Corporal Total (TBW)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
60%/50%
About this calculator
The Total Body Water (TBW) is the amount of water present in the human body, representing about 60% of body weight for men (H) and 50% for women (M).
This calculator allows you to calculate the TBW based on body weight, providing an important estimate for the evaluation of the body's hydration level.
It is essential to consider that the TBW may vary according to factors such as age, sex, weight and body composition.
In addition, it is essential to remember that the formula used here is an approximation and may not reflect the individual reality of each person.
Frequently asked questions
Why does the TBW calculation vary between men and women?
The difference is due to body composition, with women having more body fat and men having more muscle mass, affecting the amount of water in the body.
What is the purpose of TBW in the evaluation of body hydration?
TBW is an important indicator for evaluating body hydration, as an inadequate amount of water can lead to health problems, such as dehydration and changes in organ function.
How can TBW be affected by external factors?
TBW can be affected by external factors such as ambient temperature, level of physical activity and exposure to the sun, among others.
What happens if TBW is very low?
If TBW is very low, it may indicate severe dehydration, which can lead to serious health problems, such as shock and renal insufficiency.