Inputs
Mortgage
This estimate focuses on principal and interest only.
Monthly payment
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Result explanation
How to read this result
Visualization
02
Mortgage Calculator
Estimate principal and interest payments from price, down payment, rate, and term.
Sponsored
Guide
Using the Mortgage Calculator
What the calculator does
Open this calculator when you want to estimate principal and interest payments from price, down payment, rate, and term.
It works especially well for side-by-side money decisions such as payments, savings targets, pricing, or affordability checks.
Formula and calculation explanation
Enter Home price, Down payment, Interest rate, and Term. Those values let the page estimate principal and interest payments from price, down payment, rate, and term.
This calculator uses the standard amortized-loan equation, which spreads principal and interest across a fixed number of equal payment periods.
On pages with a down payment, the loan principal is calculated first and then passed into the payment formula.
Amortized payment
\[PMT = P \cdot \frac{i(1+i)^n}{(1+i)^n - 1}\]
P is principal, i is the periodic interest rate, and n is the number of payments.
Real-world examples
- Scenario example: enter home price 425,000, down payment 85,000, interest rate 6.75, and term 30. That gives you a practical way to compare a realistic financial scenario before making a decision.
- Comparison example: keep the baseline values the same and change home price to see how the monthly payment responds.
Step-by-step walkthrough
- Enter Home price, Down payment, Interest rate, and Term.
- Check that each value is in the units named by the field labels.
- Click Calculate Mortgage. The calculator applies the method shown above and updates the answer instantly.
- Review the monthly payment and the supporting values for total interest and total paid, then adjust one input at a time to compare scenarios cleanly.
FAQs
What does the monthly payment result mean?
The main result shown here is monthly payment. The calculator also returns total interest and total paid so you can review the most useful supporting numbers at the same time.
How should I enter the inputs?
Fields marked with (%) expect percentage-style inputs such as 6.5 for 6.5%, unless the field explicitly says otherwise.
Why might this calculator differ from another tool?
Other tools may include extra assumptions such as taxes, insurance, fees, compounding schedules, or rounding rules. This page focuses on the inputs and formulas shown on the screen.
Common mistakes
- Entering a decimal such as 0.07 when the field expects a percent value such as 7.
- Mixing monthly amounts with annual rates or terms without checking the time basis carefully.
- Changing several inputs at once, which makes it harder to see which variable actually moved the result.
Edge cases
- A 0% rate, ratio, or growth value often simplifies the formula into a direct no-change or principal-only case.
- Very short terms, very high rates, or unusually small payments can create results that look extreme but are mathematically consistent.
- If a required field is left blank or contains an unsupported value, the calculator will not return a useful result until the input is corrected.
Interpretation of results
The main result shown here is monthly payment. The calculator also returns total interest and total paid so you can review the most useful supporting numbers at the same time.
- Treat the primary dollar figure as the headline answer, then use the supporting amounts to understand tradeoffs such as interest, savings, profit, or total cost.
- The supporting metrics help you understand why the headline result looks the way it does and which tradeoffs sit behind it.
- When you compare scenarios, change one key input at a time so you can tie each output change back to a specific assumption.
Related concepts and calculators
Related ideas for this page include rates, time value of money, cash flow, affordability, tradeoffs, and amortization.