BondValue

Savings bond calculators

BondValue has three free savings-bond calculators: an I bond value estimator (what your bond is worth now, with the 3-month penalty), an I bond composite-rate calculator (the official fixed + inflation formula), and an EE bond 20-year doubling illustration. They are estimates; for the exact penny value of a real bond, use TreasuryDirect’s official Savings Bond Calculator. The current I bond rate is 4.26% and the current EE rate is 2.40%.

I bond value calculator

Estimate the current value of a Series I bond from your purchase amount and issue month.

 I bond composite-rate calculator

Compute the composite rate from a fixed rate and a semiannual inflation rate.

 EE bond doubling calculator

See how the 20-year guarantee doubles an EE bond’s value.

Related

Not investment or tax advice. BondValue is an independent reference, not affiliated with the U.S. Treasury or TreasuryDirect. Savings bond rates reset every 6 months (on May 1 and November 1), and any value shown here is an estimate. Verify current rates and the exact penny value of your bonds at TreasuryDirect’s official Savings Bond Calculator. Consult a qualified professional before making financial decisions.

Last updated: 2026-06-21