Formula for Weight Calculation

A previous retrospective Australian study on over 70000 pediatric ED attendances derived formula for three different age ranges:

For Infants < 12 months : Weight (Kg) = (age in months+9)/2

For Children aged 1-5 years : Weight (Kg) = 2 X (age in years +5)

For Children aged 5-14 years : Weight (Kg) = 4 X age in years.

Another study

The revised formula that the author suggests as a replacement can be used from 1-13 years inclusive as a validated evidence-based system to estimate the weight of children today.

WT = ( 3 X age ) + 7

About arithmetic formulas for calculating ideal body weight (Adult):

Dr. BJ Devine published the following formula:

Men: Ideal Body Weight (in kilograms) = 50 + 2.3 kg per inch over 5 feet
Women: Ideal Body Weight (in kilograms) = 45.5 + 2.3 kg per inch over 5 feet

Dr. JD Robinson published a modification of the formula:

Men: Ideal Body Weight (in kilogram): 52 kg + 1.9 kg for each inch over 5 feet

Women: Ideal Body Weight (in kilogram): 49 kg + 1.7 kg for each inch over 5 feet

Dr. DR Miller published a different modification:

 

Men: Ideal Body Weight (in kilogram)= 56.2 kg + 1.41 kg for each inch over 5 feet

Women: Ideal Body Weight (in kilogram)= 53.1 kg + 1.36 kg for each inch over 5 feet

References:

http://www.impactednurse.com/

http://resume.em.extrememeember/com
http://www.halls.md/ideal-weight/devine.htm