Mortgage Calculator

Calculate your monthly mortgage payment, total interest, and total payment amount based on loan amount, interest rate, and loan term.

Example: $300,000 loan at 4.5% for 30 years → Monthly payment: ~$1,520

What this calculator does

The mortgage calculator estimates your monthly home-loan repayment and shows how much of the total cost is interest. It helps you compare loan terms and see how a bigger down payment changes your payment.

How it's calculated

After subtracting your down payment from the property price to get the loan amount, the tool uses the standard amortising-loan formula:

M = L × r × (1+r)ⁿ ÷ ((1+r)ⁿ − 1)

where L is the loan amount, r the monthly interest rate and n the number of monthly payments.

How to use it

Enter the property price.
Enter your down payment.
Enter the annual interest rate and the loan term in years.
Calculate to see the monthly payment, total interest and total paid.

What this estimate leaves out

The figure covers principal and interest only. Your real monthly cost may also include property taxes, home insurance, and (in some countries) mortgage insurance or HOA fees. Treat the result as a planning estimate.

Frequently Asked Questions

How much down payment do I need?

It varies by lender and country, but a larger down payment reduces your loan amount, monthly payment and total interest.

Does this include taxes and insurance?

No. This calculator shows principal and interest only. Add property tax, insurance and any HOA fees separately for your full monthly cost.

Can I pay off a mortgage early?

Often yes. Extra payments reduce the principal and total interest, though some loans have prepayment terms worth checking.

Does this tool store my data?

No. Everything runs entirely in your browser. Nothing you enter is uploaded, saved, or shared.