13.2: Nutrition Calculations Reference Sheet

Background Information: 1 kilogram = 2.2 pounds 1 inch = 2.54 centimeters 60 inches = 5 feet

Anthropometric Calculations
Hamwi Method for Ideal Body Weight (IBW)	Female equation 5 feet = 100#, every inch over add 5# Male equation 5 feet = 106#, every inch over add 6#
Ideal Body Weight Range (IBW range)	Add/subtract 10% of IBW
Percent Ideal Body Weight (% IBW)	Actual Weight X 100 IBW
Analysis of IBW	Greater than 120% of IBW: Obese 110%-120% of IBW: Overweight 90%-109% of IBW: Adequate 80%-89% of IBW: Underweight 70%-79% of IBW: Moderately underweight Less than 70% of IBW: Severely underweight
Percent Usual Body Weight (UBW)	Actual Weight X 100 UBW
Analysis of UBW	Changes of 10% or less of no major concern unless person above or below IBW Changes of 10% or more need to be addressed, is weight gain or loss desired or planned
Body Mass Index (BMI)	Weight in pounds x 703 (height in inches)2
Analysis of BMI	BMI< 18.5 = Underweight BMI 18.5 -24.9 = Normal BMI 25-29.9 = Overweight BMI 30 – 34.9 Class 1 Obesity BMI 35 – 39.9 = Class 2 Obesity BMI over 40 = Class 3 Extreme Obesity
Waist Circumference	Males < 40 inches = Healthy Females < 35 inches = Healthy
Waist-to-Hip Ratio	Waist Circumference / Hip Measurement
Analysis of Waist-to-Hip Ratio	Males > 0.9 Abdominal Obesity Females >0.85 Abdominal Obesity
Body Fat Percentage	MEN: WOMEN: 2-4% body fat is essential 10-12% is essential 6-13% is an athletic body fat range 14-20% is a healthy range for athletes 14-17% is considered a 'fit' range 21-24% is healthy for fitness 18-25% is acceptable 25-31% is an 'acceptable' range above 26% is considered obese above 32% is considered obese
Fat Mass	Body Weight x Body Fat %
Lean Mass	Body Weight – (Body weight x Body Fat %)

Estimating Nutrients Needs for Adults
Basal Metabolic Rate (BMR): Energy needed to keep you alive	Male: weight in kg x 1 calorie/kg/hour x 24 hours Female: weight in kg x 0.9 calorie/kg/hour x 24 hours
Total Energy Expenditure (TEE): Energy needed to keep you alive plus activity factor	BMR x Activity Factor Sample Activity Factors: Confined to bed: 1.2 Out of bed, low activity 1.25 Average activity 1.65 Highly active 2.0
Quick Determination of Total Energy Expenditure (TEE) • Another method for estimating daily energy needs for adults • Used frequently in a clinical setting	Weight in kilograms x Activity factor Activity/stress Factor: Minimal Activity (bedridden): 25 kcal x kg Normal Activity (ambulatory): 30 kcal x kg Moderate Activity (exercise 3x/week): 35 kcal x kg Increased Activity (exercise 5x/week): 40 kcal x kg Intense Activity (exercise daily): 45 kcal x kg
Determining Protein Needs	Weight in kg X protein factor Protein Factor: Normal activity 0.8gm/kg/day Daily physical activity 1.0-1.2 gm/kg/day Heavy daily physical activity 1.2-1.5 gm/kg./day
Determining Fluid Needs • Can determine based on calorie intake OR weight	1 ml of fluid for every calorie intake OR Weight in kg x Fluid factor Fluid Factors: 25 ml X kg body wt for > 75 yo or inactive 30 ml X kg body wt for 55-75 yo or moderately active 35 ml X kg body wt for 20-55 yo or moderately active 40 ml X kg body wt for 16-30 yo or highly active