WebToolArcBasis points make absolute rate moves unambiguous
A basis point is exactly one hundredth of a percentage point: 1 bp = 0.01 percentage points = 0.0001 as a decimal rate. A move from 4.50% to 4.75% is therefore +25 bps. Calling that “a 0.25% increase” can be ambiguous because the same move is about a 5.56% relative increase from the 4.50% starting level.
Use the rate solver in either direction
If you know a starting rate and a signed basis-point move, enter the move to calculate the ending rate. If you instead know the starting and ending rates, edit the ending rate and the Studio reverse-solves the exact basis-point difference. Negative values represent cuts or narrower spreads; positive values represent increases or wider spreads.
Dollar impact is simple rate-difference arithmetic
The amount-impact result uses amount × bps ÷ 10,000. For example, 25 bps on 100,000 is 250 for a one-year simple rate difference, with monthly and quarterly equivalents shown only as annual impact divided by 12 or 4. This is not a loan-payment model and does not include amortization, compounding, taxes, duration, fees, or timing of cash flows.
Common uses and limits
Basis points are commonly used to describe interest-rate moves, yield spreads, fees, and expense-ratio differences because the unit avoids percentage-language ambiguity. Use the scenario grid for sensitivity checks and the batch workspace for several quoted-rate comparisons, but verify any real product terms and current rates from their authoritative source.