Calculator
What a quarter point is worth
The same loan priced at rates you pick, side by side. Every rate here is a comparison figure you enter — none is quoted, offered, or available. It runs entirely in your browser.
The same loan at different rates
This runs entirely in your browser. Nothing you type is sent anywhere, stored, or used to contact you. The rates below are values you choose for comparison — none of them is quoted, offered, or available here.
Spread across the rates compared
$143,513
more total interest at the highest rate shown than at your base rate of 6%
- Loan amount
- $400,000
- Payment at 6%
- $2,398
- Total interest at 6%
- $463,354
Calculation version mortgage-math@1.0.0
Side by side
| Rate | Monthly payment | vs base | Total interest | vs base |
|---|---|---|---|---|
| 6%base | $2,398 | — | $463,354 | — |
| 6.5% | $2,528 | +$130 | $510,180 | +$46,826 |
| 7% | $2,661 | +$263 | $558,036 | +$94,682 |
| 7.5% | $2,797 | +$399 | $606,867 | +$143,513 |
Total interest assumes every scheduled payment is made and the loan is held to term. No rate shown here is quoted, offered, or available — each one is a figure you entered so the arithmetic can be compared.