Mortgage Interest Calculator

Estimate mortgage payments, total interest, and savings from extra payments.

Mortgage details

Mortgage Amount

$

Interest Rate

%

Amortization

years

Mortgage Type

Payment Frequency

Extra payments

Extra Monthly Payment (Full Term)

$

Extra Annual Payment

$

Round Remaining Balance To

$

Scheduled extra monthly payments

The amounts shown above are rough, unverified estimates built for my own personal use only. They are not financial, legal, or tax advice, and they come with no guarantee of accuracy or completeness.
I built this for myself only and did not consult any professional while using it. Do not rely on these numbers to make any financial decision — always consult a qualified mortgage professional for accurate and up-to-date information.
Fixed mortgages compound interest semi-annually and variable mortgages compound monthly, following Canadian conventions.

© 2026 Mark Uy