After much agony I found your plugin which solves my expression problem, thank you. Beginner level Bubble skill here.

I got this expression working on your test page:

*(((Expression SumOfFolds’s value-40)/20((Input Weight’s value^0.425)(Input Heights’s value^0.725)71.84/10000)0.739/Input Weight’s value-0.003)^0.50.7)**

Basically it is a body fat calculator.

It takes the following input values from an input form:

- 10 body site measurements are captured and sum’d into a total (Expression SumOfFolds)
- Weight (Input Weight’s value) and Height (Input Height’s value) are then added to the expression to calculate the body fat number (eventually should be shown as a %)

2 questions for help:

- How would I set this up on the input form without using your method of an input text field containing the expression?
- I have 8 different “formulas” to calculate body fat and I like to store them in the data base and then select which one/method I need to use to perform the body fat calculation. Is this possible?

Also, all the input are taken with 1 decimal place place I need to round the answer from the expression off to 4 decimals. How do I do that?

Any help will be much appreciate and thanks again. Best $20 I’ve spent this week.