身体总水分量计算器
用 Watson 方法估算体内水分
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身体总水分量计算器
水分是人体单一成分中占比最大的部分。本计算器使用经过验证的 Watson 公式，根据年龄、性别、身高和体重，以升为单位并以占体重的百分比估算您的身体总水分量（TBW）。TBW 通常约为体重的 50–65%，男性和体型偏瘦者更高，体脂越多则越低，因为脂肪几乎不含水分。该数值在营养管理、肾脏护理和体液管理中常作为基准参考值。
采用 Watson 公式估算的结果。身体总水分量通常约为体重的 50–65%，男性和体型偏瘦者更高，体脂越多则越低。水分摄入需求及临床应用请咨询专业人士确认。
常见问题
- What is total body water and why does it matter?
- Total body water (TBW) is the total volume of fluid in your body, both inside and outside your cells. It's central to circulation, temperature control and nutrient transport, and typically makes up a little over half of adult body weight.
- How is total body water calculated?
- This calculator uses the Watson formula, which estimates TBW in litres from your age, sex, height and weight using sex-specific equations. Enter those four values and it returns your estimated litres of body water and that water as a percentage of body weight.
- What percentage of body weight should be water?
- Total body water is generally around 50–65% of body weight, typically near 50–55% for women and 55–65% for men, declining with age and higher body fat. Leaner, more muscular bodies hold a higher water percentage since muscle is water-rich.