Body Weight

Last updated 13.02.13

 

-  Paediatric weight

- Weight in pregnancy

-  Body Mass Index (BMI)

-  Ideal Body Weight (IBW)

   

Body Mass Index (BMI)

-  Used as indicator of optimal weight

-  Calculation: weight (kg) / height (m) x height

-  Often used in conjunction with waist circumference

-  Used in adolescents & adults, not children

-  Paediatric weight

-  Classification

-    BMI < 18.5 = Underweight

-    BMI 18.5 – 24.9 = Normal weight

-    BMI 25 – 29.9 = Overweight

-    BMI 30 – 34.9 = Obese class I

-    BMI 35 – 39.9 = Obese class II

-    BMI >39.9 = Obese class III

 

BMI

 

Ideal Body Weight (IBW)

-  Used as indicator of optimal body weight for drug calculations

-  Add 10% for heavy frame pts

-  Take 10% for light frame pts

-  Weights

-  152cm (5ft 0): M= 50kg, F= 46kg

-  155cm (5ft 1): M= 52kg, F= 48kg

-  157cm (5ft 2): M= 55kg, F= 50kg

-  160cm (5ft 3): M= 57kg, F= 52kg

-  162cm (5ft 4): M= 58kg, F= 55kg

-  165cm (5ft 5): M= 61kg, F= 57kg

-  168cm (5ft 6): M= 63kg, F= 59kg

-  170cm (5ft 7): M= 65kg, F= 62kg

-  173cm (5ft 8): M= 67kg, F= 64kg

-  175cm (5ft 9): M= 70kg, F= 66kg

-  178cm (5ft 10): M= 72kg, F= 68kg

-  180cm (5ft 11): M= 74kg, F= 71kg

-  183cm (6ft 0): M= 77kg, F= 73kg

-  185cm (6ft 1): M= 79kg, F= 75kg

-  188cm (6ft 2): M= 80kg, F= 78kg

-  190cm (6ft 3): M= 85kg, F= 80kg

-  193cm (6ft 4): M= 87kg, F= 82kg

-  Calculation

-  For patients outside above ranges

-  < 152cm: -2.3kg/2.5cm (1 inch)

-  > 193cm

-  M: 50kg + 0.9kg/cm over 152cm

-  F: 45.5kg + 0.9kg/cm over 152cm

 

 

 

References

 

Australian Dietary Guidelines 2013