T-Bill Discount Yield Calculator
Bank-discount yield, investment yield (BEY) and price for a US Treasury bill from its discount rate quote.
Formula
T-bills are quoted on the bank-discount basis, which understates your true return because it divides by face (not price) and uses a 360-day year. The bond-equivalent yield is the number to compare against notes and bonds.
Not financial advice — for informational and analytical use only. Verify all figures with a qualified professional before acting on them.
Need t-bill discount yield calculator results fast? Analysts, founders, traders and finance professionals use the T-Bill Discount Yield Calculator to skip the spreadsheet and get a defensible answer in one step — free, private and instant.
About T-Bill Discount Yield Calculator
Bank-discount yield, investment yield (BEY) and price for a US Treasury bill from its discount rate quote. T-bills are quoted on the bank-discount basis, which understates your true return because it divides by face (not price) and uses a 360-day year. The bond-equivalent yield is the number to compare against notes and bonds. The governing relationship is P = F·[1 − d·t/360]; BEY = (F−P)/P × 365/t. The T-Bill Discount Yield Calculator computes entirely in your browser — free, private (your figures never leave your device) and instant, recalculating live as you change any input.
How to use T-Bill Discount Yield Calculator
- 1Enter Face value (currency), Quoted discount rate (%), Days to maturity into the T-Bill Discount Yield Calculator.
- 2The result is computed automatically using P = F·[1 − d·t/360]; BEY = (F−P)/P × 365/t — there is no button to press.
- 3Change any input to model a different scenario, then copy or share the result.
Why use T-Bill Discount Yield Calculator?
- ✓Computes t-bill discount yield calculator instantly with the correct formula — no spreadsheet needed
- ✓100% free and unlimited, with no sign-up, login or paywall
- ✓Runs entirely in your browser, so the figures you enter stay private
- ✓Shows the formula, a live worked example and references so you can defend the number
Frequently asked questions
What is the formula behind the T-Bill Discount Yield Calculator?+
T-Bill Discount Yield Calculator uses P = F·[1 − d·t/360]; BEY = (F−P)/P × 365/t. T-bills are quoted on the bank-discount basis, which understates your true return because it divides by face (not price) and uses a 360-day year. The tool substitutes your actual inputs into this relationship and shows the worked example step by step.
What inputs does the T-Bill Discount Yield Calculator need?+
Enter Face value (currency), Quoted discount rate (%), Days to maturity and the result updates immediately — there is no button to press. Change any value to model a different scenario in real time.
Is the T-Bill Discount Yield Calculator free, and is my data private?+
Yes — it is completely free with no sign-up or usage limit, and it runs entirely in your browser, so the numbers you enter are never uploaded or stored on any server. It is for informational and analytical use, not financial advice.
What should I watch out for when using the T-Bill Discount Yield Calculator?+
The bond-equivalent yield is the number to compare against notes and bonds.
What is the T-Bill Discount Yield Calculator based on?+
The method follows authoritative sources: TreasuryDirect — Treasury bill pricing. The formula and references are shown on the page so you can verify and cite the result.
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