I am building a conversion calculator. I would like to store the references and formulas for the calculator in JSON.

I do not know how to “process the variable as math”.

Json

var JSON = {
  "conversions": [{[
 {
   "FromType": "in3",
   "ToType": "ft3",
   "Math": "/1728",
   "Description": "divide the volume value by 1728"
 }...

With the “Math” being done something like this.

D1 = document.getElementById("data1").value;
var theAnswer = eval(D1 conversions[0].Math);

Example:

D1 = 25
theAnswer = D1 /1728
theAnswer = 0.0144675

Is this possible? Is there a better way?