Question: how to figure out how many years left on mortgage?
Answer: The formula goes like this: B = (PMT/R) x (1 - (1/(1+R)^N) In the formula, "B" is the principal balance, "PMT" is the monthly payment for principal and interest and "N" is the number of months remaining. "R" is your interest rate, but it's expressed as a monthly rate rather than an annual one.