TBillLab

U.S. Treasury bill yields, prices and profits — instant, private, no sign-up.

Your T-bill numbers never leave your browser — all math runs locally.

Yields & Price

Convert a T-bill discount into its real annualized yield (BEY).

See the dollar profit and annualized return on a T-bill.

Compute the Bank Discount Yield (BDY) of a T-bill.

Find the purchase price that delivers a target BEY.

Get the Bond Equivalent Yield to compare T-bills with other investments.

Price a T-bill from its auction and maturity dates.

The yield you earn by holding a T-bill to maturity.

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

Yield and profit on an 8-week (56-day) T-bill.

Yield and profit on a 13-week (91-day) T-bill.

Yield and profit on a 26-week (182-day) T-bill.

Yield and profit on a 52-week (364-day) T-bill.

Compare a T-bill’s BEY with a CD’s APY over the same term.

Roll T-bills over several cycles and see total profit.

Split a purchase into a staggered T-bill ladder.