Calculating Monthly Income from one of several different fields

Hi,
One practical way to calculate monthly income when you only know the weekly, bi-weekly, or annual numbers is to use a conversion approach:

• Weekly → Monthly: multiply by 4.33

• Bi-weekly → Monthly: multiply by 2.165

• Semi-monthly → Monthly: just add the two payments (since semi-monthly means twice a month)

• Yearly → Monthly: divide by 12

This method is what many HR and payroll systems also use when evaluating benefits eligibility. If you’d like to see a working version, I recently came across an online tool that does this automatically in Italian (but the math is universal) calcolo-stipendionetto  it converts income from weekly/annual/etc. into monthly net salary.

Hope that helps!

I would use the Validation event of those fields for that.

For example, as the custom Validation event of Annual Income you can enter something like this:

if (event.value) this.getField("Monthly").value = Number(event.value) / 12;

Using the same logic, multiply by 4 to get the result from the Weekly field and multiply by 2 for Bi-Weekly.

I'm not sure what you mean by "semi-monthly", but I think you can get the gist of how it works... Plus, it will allow the user to enter a value into the Monthly field directly, if they wanted to do so.