How to calculate a mortgage payment
To calculate a mortgage payment, open the ToolCrix Mortgage Calculator and enter the home price, down payment, interest rate, term and any extra monthly payment. It shows your monthly payment, total interest, total cost and a full amortization schedule — instantly and privately in your browser.
Thinking about a home loan? This free mortgage calculator shows your monthly payment, total interest, total cost and a full amortization schedule — instantly and privately in your browser. See exactly what a loan will cost before you commit.
Why estimate your mortgage before you borrow
A mortgage is likely the biggest financial commitment you'll make, and small changes in rate or term move the numbers by tens of thousands. Estimating first lets you compare scenarios and avoid surprises.
Seeing the amortization schedule shows how much of each payment goes to interest versus principal — and how extra payments can save years and a fortune in interest.
How to use it (step by step)
- Open the Mortgage Calculator.
- Enter the home price and your down payment.
- Set the interest rate and loan term (e.g. 30 years).
- Add property tax, insurance and any extra monthly payment.
- Review the monthly payment, total cost and amortization schedule.
What you can use it for
- Estimating a monthly mortgage payment before applying.
- Comparing 15-year vs 30-year terms.
- Seeing how a bigger down payment changes the cost.
- Working out how extra payments shorten the loan.
- Budgeting for total monthly housing cost (with tax/insurance).
What drives your payment
- Loan amount — price minus down payment.
- Interest rate — even 1% changes the total a lot.
- Term — longer term = lower payment but more total interest.
- Extra payments — cut years and interest off the loan.
Tips
- A larger down payment lowers both the payment and total interest.
- Shorter terms cost more monthly but far less overall.
- Even small extra monthly payments save big over 30 years.
- Include tax and insurance for a realistic monthly figure.
Frequently Asked Questions
How is a monthly mortgage payment calculated?
It uses the standard amortization formula based on loan amount, interest rate and term. The tool computes it and shows the full schedule.
What's included in the monthly payment?
Principal and interest, plus optional property tax and insurance for a complete estimate.
Is the mortgage calculator free?
Yes — free, instant and private, with no sign-up.
How do extra payments help?
Extra payments go straight to principal, shortening the loan and cutting total interest — the schedule shows how much you save.
Is my financial data private?
Yes. Everything is calculated in your browser; nothing is uploaded.
How much do extra mortgage payments save?
Even small extra monthly payments can shorten a 30-year loan by years and save tens of thousands in interest. The ToolCrix calculator's schedule shows exactly how much you save for any extra amount.
What's a realistic interest rate to model?
Use the current advertised rate for your country and loan term as a starting point, then run the calculator with rates 1% above and below to see how sensitive the monthly payment is — useful when comparing lenders.
Try it now: open the free Mortgage Calculator or the Percentage Calculator, or browse more guides.