Estimate current yield and yield to maturity of a bond. Free, private, and runs entirely in your browser.
Current yield is the annual coupon over price. Approximate YTM adds the yearly pull to par to the coupon, divided by the average of face value and price.
Why does price change yield? A bond bought below face value earns more than its coupon rate.
Is the YTM exact? No, this is a standard approximation.