## Body Surface Area Calculator (BSA)

### Body Surface Area

BSA measures the total surface area of the body and is used to calculate drug dosages and medical indicators or assessments. The Mosteller formula takes the square root of the height (cm) multiplied by the weight (kg) divided by 3600.The average adult BSA is 1.7 m2 (1.9 m2 for adult males and 1.6 m2 for adult females).

Lean Body Weight (men) = (1.10 x Weight(kg)) – 128 ( Weight2/(100 x Height(m))2)

Lean Body Weight (women) = (1.07 x Weight(kg)) – 148 ( Weight2/(100 x Height(m))2)

**Body Mass Index = Weight(kg) / Height(m)2**

### Dubois Formula

The body surface area (BSA) is a mathematical relationship, expressed in m2, with the result obtained from the height and weight.

The “normal” body surface area is generally taken to be 1.7 m2 but, in actual fact, the body surface area depends on more than just height and weight. Other influential factors include the age and gender of the individual. For example:

Average body surface area for adult men: 1.9 m2

Average body surface area for adult women: 1.6 m2

Average body surface area for children (9 years): 1.07 m2

Average body surface area for children (10 years): 1.14 m2

Average body surface area for children (12-13 years): 1.33 m2

– **Meban Formula:** (BSA m2 = 6.4954 × weight (g) 0.562 × height (cm) 0.320) is possibly the best to estimate the body surface of newborns.

– **Mosteller Formula :** √[(height in cm × weight in kg)/3600].

– **Dubois Formula:** (W 0.425 x H 0.725) x 0.007184