i nead a calculator that will let me put in my intrist rate and my balance and how much i want to pay mounthly

i nead a calculator that will let me put in my intrist rate and my balance and how much i want to pay mounthly and based on thoes numbers inputed tell me how long it will take me to pay off the debt IE. 5000 debt at 19.5 intrest at 450 pay,ent a mounth would [...] http://bit.ly/mxIXAC