T-Bill Calculator
Estimate how much a live U.S. Treasury bill could earn by maturity using current Treasury bill data, selected terms, and your investment amount.
The bill selector loads current Treasury bill data from the connected Treasury/TreasuryDirect data source when the page opens.
This calculator is designed for short-term cash planning. It helps you estimate purchase price, expected interest, and maturity value using currently available Treasury bill data.
Want to compare a Treasury bill against a savings account? Use the Compare Tool →
Want to structure multiple bills over time? Build a Treasury Ladder →
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Selected Treasury Bill
- Security
- —
- Issue Date
- —
- Maturity Date
- —
- Days
- —
- Annual Yield
- —
Estimated Return
- Investment Amount
- $0.00
- Estimated Interest
- $0.00
- Maturity Value
- $0.00
- Purchase Price
- $0.00
- Annualized Return
- 0.00%
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How this calculator works
This tool uses currently available Treasury bill data to estimate how much you could earn by maturity based on the amount you enter and the bill you select.
Treasury bills are generally sold at a discount and mature at full face value. This calculator estimates the difference between your purchase price and maturity value using current bill information.
Actual auction pricing, settlement timing, and brokerage mechanics may differ slightly. This calculator is for educational and planning purposes only and does not constitute financial advice.
Calculate returns for different T-Bill terms
Use this calculator to estimate returns for available Treasury bill terms, including short-term bills such as 4-week, 8-week, 13-week, 17-week, 26-week, and 52-week T-Bills when those terms are available in the live data.
Select a bill from the dropdown to automatically fill the current yield, issue date, maturity date, days to maturity, CUSIP, and price per $100.
The calculator then estimates interest earned, maturity value, purchase price, and annualized return based on your investment amount.
When this calculator is useful
- Estimating what a specific T-bill could earn by maturity
- Planning short-term cash for a known future date
- Comparing Treasury bills with savings accounts
- Choosing amounts for a Treasury ladder
- Understanding how short-term government yields translate into dollars
What affects your estimate
- The live Treasury bill you select
- The annual yield associated with that bill
- The number of days until maturity
- Your investment amount
- How actual auction or purchase pricing differs from a simplified estimate
Treasury bill calculator FAQ
Is this the exact amount I will earn?
It is an estimate for planning purposes. Actual purchase price, settlement timing, and execution details may vary slightly.
Is this better than a savings account?
It depends on your timeline. Treasury bills are often better for cash you can leave untouched until maturity, while savings accounts are usually better for immediate access.
Can I use this for ladder planning?
Yes. This calculator is useful for estimating individual ladder rungs before using the full ladder builder.
Does this T-Bill calculator use live data?
Yes. The bill selector loads current Treasury bill data from the connected Treasury data source, including available terms, yields, issue dates, maturity dates, CUSIPs, and price information.
Can I calculate a 4-week, 8-week, 13-week, or 26-week T-Bill?
Yes, when those Treasury bill terms are available in the live data. Choose the bill term from the dropdown, enter your investment amount, and calculate the estimated return.
What date is the calculator data from?
The page displays the latest Treasury bill issue date found in the loaded data and checks the connected Treasury data source when the page opens.
Learn more before you invest
If you are using this calculator as part of a broader cash strategy, these tools and guides can help: