Also came across this:
http://litecoinminingcalculator.com/index.php?khs=500&diff=100.54392252&cdiff=100.54392252&fee=0
http://litecoinminingcalculator.com/index.php?khs=500&diff=100.54392252&cdiff=100.54392252&fee=0
Thank you ! I was searching for a web calculator with a difficulty setting
