TBillLab

4 Week T-Bill Calculator

Yield and profit on a 4-week (28-day) T-bill.

Your T-bill numbers never leave your browser — all math runs locally.
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Try: Face value=1000, Purchase price=996, Days to maturity=28 → $1,000, $996, $4, 0.0514%, 0.0524%, 0.0524%

How to use

4-week bills auction weekly and are the shortest standard tenor. Enter the discount to see the annualized BEY.

FAQ

How often are 4-week bills auctioned?

Every Monday (rolled weekly), making them a liquid cash-management tool.

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