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Estimate principal-and-interest mortgage payments on a fixed-rate home loan.
Use this fixed rate mortgage calculator to see how a stable interest rate affects monthly payment and total borrowing cost over time. The calculator is designed to give a fast answer, but the quality of the answer still depends on accurate inputs and a clear idea of what decision you are trying to support.
- Enter Home Price, Down Payment, and Annual Interest Rate using the same units you plan to compare or report.
- Add Loan Term and review the inputs before calculating.
- Read the main monthly payment first, then use the supporting outputs to understand the trade-offs behind that result.
- Compare your numbers with the worked examples below if you want a quick reasonableness check.
The monthly payment is the principal-and-interest portion only, which makes it useful for comparing financing structures before layering in taxes, insurance, or HOA costs. On this page, the primary output is monthly payment.
Scenario 1: $320,000 fixed-rate mortgage at 6.1% over 30 years with $40,000 down. Inputs used: homePrice: 360000, downPayment: 40000, rate: 6.1, term: 30. Example result: $11,527.70. This fixed-rate mortgage example results in $11,527.70 per month for principal and interest. Scenario 2: $410,000 fixed-rate mortgage at 5.4% over 20 years with $60,000 down. Inputs used: homePrice: 470000, downPayment: 60000, rate: 5.4, term: 20. Example result: $21,482.40. With the shorter term, the monthly mortgage payment comes to $21,482.40.
Core formula: same amortization model as loans, applied to home price minus down payment. The mortgage calculator converts home price and down payment into a loan amount, then applies the amortization formula to estimate principal-and-interest payments.
- This page does not include taxes, insurance, or PMI.
- Longer terms reduce monthly payments but increase total interest.
Use this calculator when comparing home prices, down payments, rates, and loan terms before requesting lender quotes. Related paths for follow-up analysis include mortgage calculator, mortgage payment calculator, refinance calculator, and loan calculator.
Most bad outputs come from a few repeated input errors or interpretation mistakes. Use this short checklist before relying on the result.
- Assuming the result includes taxes, insurance, PMI, or maintenance.
- Entering a down payment percent as a dollar amount.
- Optimizing only for monthly payment while ignoring lifetime interest cost.
