Who runs it
Jacky Jian operates Savings Bond Calculator as an independent developer. It makes published bond data easier to read through a value lookup, local list and official source links. It is not a Treasury service and does not claim government endorsement or financial qualifications.
Checking figures
The project uses Treasury value files and rate histories. Automated tests compare calculations with published values and official paper calculator samples. The methodology shows actual counts, conflicts and limitations without unsupported accuracy claims.
Your information
The form needs series, amount and dates. No serial number or owner name is required. The list stays in your browser, as explained in the Privacy Policy. Use the Savings Bond Calculator without an account.
Corrections
Report source or calculation issues through Contact. Confirm values with TreasuryDirect before cashing a bond. This tool explains published rules and numbers; it does not advise whether to redeem or retain a holding.
Content updated 2026-10-03. Information only; not financial or tax advice.