Java script a converter

Avg Bid (EUR)
Project Budget (EUR)
€30 - €250

Project Description:
I would like to add some interactive functionality to a web page in my website. Here is an example of the functionailiy I would like to add to my site:
[url removed, login to view]

I would like this functionality to be a calorie to nutrient calculator (based on a mathematical equation) so that people can calculate how many grams of ffod they need in their meal plans.

Here is the web page I would like to add this functionality to.

[url removed, login to view]

Skills required:
Javascript, PHP, Software Architecture
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