Parallel LEDs

I have a psu with 1.5 volts dc.  I have a bunch of LEDs in parallel, each with a current limiting resistor.

How do I work out the value of the resistor needed?  Is it just R=V/I?  Or do I need some confusing OH GOD IM NOT GOOD WITH NUMBERS current divider formula?

disregard this.  I obviously suck cocks, first result on Google is a useful calculator.

http://led.linear1.org/led.wiz