Mortgage Interest Calculator
Result
Mortgage Interest Calculator — free online calculator.
Formula
- Calculation based on the stated inputs and formula. Assumes constant rates and excludes fees or taxes unless explicitly entered. Educational estimate only.
- The main inputs are Loan principal, Annual interest rate, Term. Enter them in the units and format shown in the calculator.
- Use monetary amounts, rates and time periods exactly as labeled; the result reflects the assumptions entered on this page.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Mortgage Interest
- Loan principal: 100000
- Annual interest rate: 6 %
- Term: 10 years
Example inputs: Loan principal = 100000; Annual interest rate (%) = 6; Term (years) = 10. Calculated result: Monthly P&I: 1110.20501942 | Total interest: 33224.60232998.
Sample result: Calculating…
Frequently asked questions
What does the Mortgage Interest calculate?
This relationship applies to the scheduled principal-and-interest cash flows; extra payments or fees change the result.
Which values should I enter?
Enter Loan principal, Annual interest rate, Term using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: Total interest = monthly payment × term months − principal.
Why might my result differ from another source?
Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.