Go to the TreasuryDirect Savings Bond Calculator at www.treasurydirect.gov/BC/SBCPrice.
Enter the Denomination, Bond Serial Number, and Issue Date (in mm/yyyy format) as they appear on your Savings Bond.
Press CALCULATE to see the Current Value.
Change the date in Value as of: field (using mm/yyyy format) to see the value at other dates in the near future.
Follow the instructions to save the Savings Bond info for the next time you visit the site.