When people first start looking at bonds, the easiest terms to mix up are coupon rate, current yield, and yield to maturity. The value of this calculator is that it separates those ideas so you can see the difference between how a bond is structured and what you actually earn at the price you pay.
Enter face value, coupon rate, market price, years to maturity, and payment frequency, and the page shows current yield, yield to maturity, total interest, and a duration-style reference value. It is especially useful for a first comparison of plain fixed-coupon bonds.
Face value is the principal amount normally repaid at maturity and is also the base used for coupon payments.
Coupon rate determines the interest promised on face value, but it is not the same thing as your actual investment return after the purchase price is considered.
It is best for plain fixed-coupon bonds with a simple maturity structure, especially when you want a clear first-pass comparison.
Coupon rate only describes the bond's interest design, while yield to maturity also reflects the price you pay and the principal you recover at maturity.
Because bonds are not always bought at par. Buying at a discount or premium changes the real return you earn.
It is best used as a reference for cash-flow timing and price sensitivity, not as a substitute for a full professional fixed-income risk report.
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