Do you store my numbers?

No. Each calculator runs locally.

Is this tax or lending advice?

No. Arithmetic with documented assumptions on each page.

Fintomat / 15 vs 30 Year Mortgage

Finance · Calculators · Runs in your browser. Nothing is sent to a server.

Compare payment and interest of two terms.

Principal

15-year rate %

30-year rate %

Results appear here.

Type the problem — numbers, a formula, or the loan fields.

Press Calculate. The answer is computed on this page.

Use the explanation, chart or schedule to check the result.

Compare payment and interest of two terms. Figures stay in this browser. Not professional advice.