Treasury Yield Calculator
This Treasury yield calculator uses the current US Treasury par yields to estimate the interest you would earn on a given amount at a chosen maturity. Pick a maturity from 1 month to 30 years and enter an amount, and it shows the official Treasury yield for that maturity and the interest it implies. The yields come straight from the US Department of the Treasury's Daily Treasury Par Yield Curve, dated Jun 25, 2026; on that date the 10 year Treasury yielded 4.4%. Treasury securities are backed by the full faith and credit of the United States and are widely used as the risk-free benchmark for other rates, so these yields are a useful reference for savings accounts, CDs, bonds and loan pricing. Annual interest is your amount times the yield, and the total over the term is that annual figure times the years to maturity. Bear in mind that Treasury publishes a new curve every business day, so the live rate may differ from the dated figure here, and that actual Treasury cash flows (semiannual coupons for notes and bonds, a discount for bills) differ from this simple-interest estimate. Use it to compare maturities and to see how much income a Treasury holding could generate at today's rates.
$10,000 in a 10 year US Treasury at the current 4.4% par yield earns about $440.00 a year, roughly $4,400.00 of interest over 10 years.
How the Treasury yield calculation works
annual interest = amount x current par yield for the maturity
interest over the term = annual interest x years to maturity
(yields are the US Treasury par yields dated Jun 25, 2026)
Treasury yield calculator: frequently asked questions
What yield does this calculator use?
It uses the official US Treasury par yield for the maturity you select, from the Daily Treasury Par Yield Curve dated Jun 25, 2026. For example the 10 year yield on that date was 4.4%. Treasury publishes a new curve every business day, so live rates may differ.
How is the interest calculated?
Annual interest is your amount multiplied by the selected yield. The total over the term is the annual interest multiplied by the number of years to maturity. On $10,000 in a 10 year Treasury at 4.4%, that is $440.00 a year and about $4,400.00 over 10 years.
Is this my guaranteed return?
The yield is the current market par yield published by the Treasury, not a guaranteed personal return. Treasury notes and bonds pay semiannual coupons and bills are sold at a discount, so the exact cash flows differ. Use this as a sourced estimate of the interest at the current yield.
Where do the yields come from?
From the US Department of the Treasury, Daily Treasury Par Yield Curve Rates, dated Jun 25, 2026, verified as at Jun 25, 2026.
Official sources
- Daily Treasury Par Yield Curve Rates (Jun 25, 2026): US Department of the Treasury, as at Jun 25, 2026.
Reviewed by the CalculatorHub team, edited by James Graham, 26 June 2026. See our methodology. General information, not financial or investment advice. Yields change every business day.