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Blood volume means the amount of blood in your body, compared to what is considered normal. Blood volume is most often done in people who are in intensive care with conditions such as kidney, liver, or heart failure. Blood volume helps providers assess the severity of these conditions and make appropriate treatment decisions.

You can calculate blood volume using a blood volume calculator or you can use this Nadler's formula:

1. Nadler's Equation

• For Males

BV = 0.3669 × h³ + 0.03219 × w + 0.6041

• For Females

BV = 0.3561 × h³ + 0.03308 × w + 0.183

2. Lemmens-Bernstein-Brodsky equation

BV = Weight × 70 / √(BMI / 22)

Here are agewise total body water intake is given.

Normal Value of total body water in the body, according to sex and age:

Formula For Calculating Total Body water for male and female are :

• Male TBW = 2.447 - (0.09156 x age) + (0.1074 x height) + (0.3362 x weight)
• Female TBW = -2.097 + (0.1069 x height) + (0.2466 x weight)

• Age calculator is an online tool with which you can find out your age using your date of birth and your current date. 
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• The Age Calculator will determine the age or interval between two dates. 
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• Calculate the age of a person, place, or thing. 
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• You can also use this calculator to find the length of time between two dates.
• The age calculator finds the age time span in years months and days, months and days, and in total days only.