Things You'll Need:
- Online savings bond calculator Treasury savings bond
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Step 1
Access an online savings bond calculator, such as the one available at TreasuryDirect.gov. (See Resources.) These calculators will help determine the interest rate of the savings bond, determined by the type of bond.
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Step 2
Select a future date in the "Value As Of" drop-down list. This will be the date by which the savings bond matures.
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Step 3
Select the type of your bond in the "Series" box. Your bond will be in one of these categories: Series EE, Series I, Series E or Savings Notes.
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Step 4
Select the denomination of the bond in the "Denomination" drop-down list. Savings bonds are sold in specific denominations, so your savings bond will be one of the preset options.
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Step 5
Type in your bond serial number. This is found in the lower-middle portion of the savings bond.
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Step 6
Type in the issue date of the bond. This date is found at the top right of the bond.
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Step 7
Click "Calculate." This will result in a dollar amount. This amount is the value of the savings bond upon maturity.
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Step 8
Divide the dollar amount you found in Step 7 by the original denomination of the savings bond. This will reveal the total interest accrued throughout the course of the loan.
