How to build health tools or calculators

[raja4]

Does anyone know how I can build health tools or Calculators? Is there any online resource available? I am interesting in building following tools for my web site

Lean Body Mass
Lose One Pound
Body Fat (2 algorithms)
Body Mass (BMI)
Calories burned (over 100 activities)
Daily Energy Expenditure
Blood Alcohol Estimate
Framesize
Ideal Weight
Pregnancy Due Date
Ovulation Estimator
Smoking Costs
Target Heart Rate
Waist to Hip Ratio

Any help in pointing me to the right direction is appreciated.

[JennyM]

I have had a BMI calculator and carbohydrate calculator created for me on Rentacoder for less than US$35. Really cheap. I actually felt guilty paying so little - considering how much work went into it.

[raja4]

Jenny, could you please sticky me the ID of the coder who was able to do this for you.