It's good to know what your bonds are worth before you redeem them. There are several options to help you determine the current redemption value of your bonds.
There is an online savings bond calculator.
There is also a free online software program that can be downloaded. It is designed for individuals that want to maintain an inventory of their bonds.
Savings Bonds Value Files are downloadable tables to help you price your bonds.
Simplified Savings Bond Redemption Tables are also available for download.