BMI and BMR Calcultor

Hi All,
For this App you may have to know the following
1. Height (in Cms)
2. Weight (in Kgs)
3. Age (in Years)
4. Gender

BMI and BMR

Body Mass Index(BMI), is a scale that provides an indication of your overall body composition and fat.
Basal Metabolic Rate (BMR), is a measure of the amount of energy your body requires to perform its normal vital functions at rest.
Your BMI and BMR are related in the sense that a lager body composition is generally associated with a higher BMR
If you have a BMI that falls outside the normal range, you can use your BMR to accurately determine the number of calories you need to consume each day to either gain or lose weight. BMR : Kcal/Day

BMI
BMI = weight(in kgs)/ (height in m ) ^ 2
BMR
for men, The Revised Harris-Benedict Equation: W for men,
P = 13.397 * weight(kgs) + 4.799 * height(cms) - 5.677 * age + 88.362
for women,
P = 9.247 * weight(kgs) + 3.098 * height(cms)- 4.330 * age + 447.593

Example Data

weight = 75
height = 172
age = 25
gender ="male"

BMI

bmi<-function(weight,height){weight/((height/100)^2)}
bmi(weight,height)

## [1] 25.35154

BMR

bmrMale<-function(weight,height,age){
  13.397*weight + 4.799*height - 5.677*age + 88.362 }
bmrFemale<-function(weight,height,age){
  9.247*weight+ 3.098*height- 4.330*age + 447.593 }
bmrMale(weight,height,age)

## [1] 1776.64

below 18.5 : underweight
18.5 to 24.9 : normal
30 to 34.9 : overweight
35 and above : obese

Eat Healthy , Stay Healthy