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Weight Loss Calculator + Installer + Source + User Interface

This project received 15 bids from talented freelancers with an average bid price of $135 USD.

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Project Budget
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Total Bids
15
Project Description

This software should be designed for informational and entertaining purposes only. The basic principle is that users enter their personal data, based on which they will receive the amount of calories they would have to eat in order to either keep their current weight, or lose some weight (depending on what they completed in the form).


The whole application consists of a single form, with the following elements:

[url removed, login to view]
1. Age (input field)
2. Gender (dropdown/radio)
3. Height (in feet & inches, or in centimeters).
4. Weight (in pounds or kilograms).
5. Daily Activity Level (dropdown):
a. No sport / exercise.
b. Light activity (sport 1-3 times per week).
c. Moderate activity (sport 3-5 times per week) - default option.
d. High activity (everyday exercise).
e. Extreme activity (professional athlete).
6. How much weight do you wish to lose? (in pounds or kilograms)
7. How much time do you have? (in days)
8. Submit button
[url removed, login to view]
[url removed, login to view]



How should the calculations be done?
There is something called "Basal Metabolic Rate" (BMR). It's the number of calories your body needs just for its basic functions - to keep your heart beating, breathing, etc. This BMR index is individual for everyone but depends mostly on your gender, age, height, and weight. The result is obtained in 2 steps:
1. Calculate the BMR by applying the Harris-Benedict equations (revised by Roza and Shizgal in 1984):


Men BMR = [url removed, login to view] + ([url removed, login to view] x weight in kg) + ([url removed, login to view] x height in cm) - ([url removed, login to view] x age in years)
Women BMR = [url removed, login to view] + ([url removed, login to view] x weight in kg) + ([url removed, login to view] x height in cm) - ([url removed, login to view] x age in years)





2. Apply the Harris-Benedict Principle: The following table enables calculation of an individual's recommended daily calorie intake to maintain current weight.
Little to no exercise Daily calories needed = BMR x 1.2
Light exercise (1–3 days per week) Daily calories needed = BMR x [url removed, login to view]
Moderate exercise (3–5 days per week) Daily calories needed = BMR x [url removed, login to view]
Heavy exercise (6–7 days per week) Daily calories needed = BMR x [url removed, login to view]
Very heavy exercise (twice per day, extra heavy workouts) Daily calories needed = BMR x 1.9

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