The Mortgage Calculator computes your monthly principal-and-interest payment on a home loan from the loan amount, interest rate and term, and generates a full amortization schedule showing how much of each payment goes toward interest versus principal over the life of the loan.
In the early years of a mortgage, the majority of each payment goes toward interest rather than principal — this calculator makes that split visible month by month, and lets you see the total interest paid over the full loan term, which is often several times the original loan amount on a 30-year mortgage.
Does this calculator include property tax and insurance (PITI)?
This calculator focuses on principal and interest (P&I), the core loan payment. Property tax, homeowners insurance and any PMI (private mortgage insurance) are additional costs lenders often bundle into a monthly escrow payment, which will make your actual total payment higher than the P&I figure shown here.
Why does a 30-year mortgage cost so much more in total interest than a 15-year one?
A longer loan term spreads payments out, lowering the monthly amount, but you pay interest for twice as long — on a typical mortgage, total interest paid over 30 years can be more than double what you'd pay on the same loan amount over 15 years, even though the interest rate may be similar.
Is my data safe when I use Mortgage Calculator?
Most AIVEXA tools run entirely in your browser (client-side), which means your files and inputs are processed on your own device and are not uploaded to a server.
Can I use Mortgage Calculator on mobile, and is it free?
Yes — it works on any modern browser (desktop, Android or iOS) without installing an app, and it's free to use with no signup or watermark.