Finance
Mortgage Calculator
Estimate monthly mortgage payments, total interest, and total repayment cost.
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Instant result
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Transparent methodology
What the result includes—and what it does not
Built for home buyers estimating principal-and-interest payments for a fixed-rate repayment mortgage.
Calculation method
- 1The monthly rate is the entered annual percentage rate divided by 12.
- 2The payment uses the standard fixed-payment amortization formula over the entered number of monthly payments.
- 3Total interest is total scheduled payments minus principal.
Assumptions and limits
- The result covers principal and interest only.
- Property tax, insurance, mortgage insurance, association fees, lender fees, points, and changing rates are excluded.
- This is a planning estimate, not a loan quote or affordability decision.
Worked example
Fixed-rate repayment estimate
Input: Enter principal, annual interest rate, and term in years.
Output: The result shows monthly principal-and-interest payment, total repayment, and total interest.
How to use it
Three steps. One clear answer.
- 1Enter or paste the values requested by the tool.
- 2Review the input units and choose any relevant options.
- 3Calculate, then copy or download the result you need.
Built for trust
Useful without the friction.
- No registration or paywall before your result.
- Responsive controls for phone, tablet, and desktop.
- Clear assumptions and warnings where estimates have limits.
Frequently asked questions
How does the Mortgage Calculator work?
The monthly rate is the entered annual percentage rate divided by 12. The payment uses the standard fixed-payment amortization formula over the entered number of monthly payments. Total interest is total scheduled payments minus principal.
What should I check before using the result?
The result covers principal and interest only. Property tax, insurance, mortgage insurance, association fees, lender fees, points, and changing rates are excluded. This is a planning estimate, not a loan quote or affordability decision.
How current is this page?
The methodology and source notes were reviewed on 2026-07-24. Editable rates and inputs should still be checked against the provider or authority linked below.
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