This free online Bond Yield to Maturity Calculator will calculate a bond's total annualized rate of return if held until its maturity date, given the current price, the par value, and the coupon rate.
Using this calculator will help you to quickly compare the total return on bonds with different prices and coupon rates.
If you don't know the answer to the questions, "What is yield to maturity?", or "What are bonds and what makes them difficult to compare to one another?", be sure to visit the Learn tab for the answers.