Enter your weight, age, and gender into the calculator to determine your Total Body Water (TBW).

TBW Calculation Formula

The following formula is used to calculate the Total Body Water (TBW) based on your weight and gender.

TBW = Weight * TBW Factor

Variables:

  • TBW is the Total Body Water in liters (L)
  • Weight is your body weight in kilograms (kg)
  • TBW Factor is 0.6 for males and 0.5 for females

To calculate TBW, multiply your weight by the appropriate TBW factor based on your gender.

What is TBW Calculation?

TBW calculation refers to the process of determining the amount of water present in your body. Total Body Water is an important measure for assessing hydration status and overall health. The calculation typically involves understanding your weight, age, gender, and in advanced methods, your height and Body Mass Index (BMI).

How to Calculate TBW?

The following steps outline how to calculate your Total Body Water using the given formula.


  1. First, determine your weight and gender.
  2. Next, use the