# Is lean body weight the same as ideal body weight?

**Lean body weight**is the difference between total

**body weight**and fat

**mass**.

**Lean body weight**is significantly correlated to cardiac output. Unfortunately, at extremes of morbid obesity this equation underestimates

**lean body weight**and can even yield negative values.

Considering this, how much lean body weight do I have?

For instance, if you **weigh** 200 pounds and **have** learned that your **body** fat percentage is 20%, multiply 200 x 0.20. This is your fat in pounds (200 x 0.20 = 40 lbs). Subtract that from your total **weight** to **get** your **lean body mass**; in this case, 200 - 40 = 160lbs of **lean body mass**!

**Body**mass index (BMI) is a common tool for deciding whether a person has an appropriate

**body weight**. It measures a person's

**weight**in relation to their height. A BMI of less than 18.5 means that a person is underweight. A BMI of between 18.5 and 24.9 is

**ideal**. A BMI of between 25 and 29.9 is overweight.

Also, how do you calculate lean body weight with anesthesia?

**Ideal body weight** is computed in men as 50 + (0.91 × [height in centimeters − 152.4]) and in women as 45.5 + (0.91 × [height in centimeters − 152.4]). A simple alternative would be to **compute ideal body weight** as the **weight** corresponding to an **ideal body mass** index of 22 kg/m^{2}.

However, if the patient is obese, then a correction is used. The **adjusted body weight** correction states that if a patient's actual **weight** is 30% over his or her ideal **body weight**, then a 40% correction factor **should** be applied and that **weight should** be used in the Cockcroft-Gault equation.