Treasury Bill Calculator
Work out a T-bill's discount, dollar return, discount rate and investment rate.
Treasury Spread Calculator
Compare two maturities and see the spread in basis points, with its history.
Savings Bond Guide
How Series EE and I bonds earn interest, and where to get an official valuation.
Built to show their work
Every calculator on TreasuryRateHub explains the formula it uses, states its assumptions and shows the numbers it plugged in, so you can check the result yourself. The calculators run in your browser; the values you type are not sent to us or stored.
Which calculator do I need?
- You bought, or are thinking of buying, a Treasury bill and want to know your dollar return and yield: use the Treasury Bill Calculator. It shows both the discount rate and the investment rate, the two conventions Treasury uses for bills.
- You want to compare two points on the yield curve, such as the 10-year and 2-year: use the Treasury Spread Calculator, which also charts the spread’s history and marks inversions.
- You own savings bonds and want to know what they are worth: read our savings bond guide, which explains how EE and I bonds earn interest and links to the Treasury’s official calculator.
Related data
Calculators provide educational estimates. They do not account for taxes, fees or your personal situation and are not investment advice. See our financial disclaimer.