What it calculates
The loan payment calculator estimates the fixed monthly payment, total paid and interest cost from principal, annual rate and term.
Choose an amount before the secure payment page opens.
Finance
Browser-sideLoan Payment Calculator
Estimate monthly payment, total paid and interest with the amortization formula visible.
Inputs
Enter principal, annual rate and term. The free result is complete and runs in your browser.
Live answer
Result
Calculations run in this browser session. CalcHarbor does not store entered values.
Support
Keep this free result available
Use the result first. Support and promotional areas stay separate from the useful result.
- Useful result first
- No signup required
- Promotions kept separate
Choose an amount before the secure payment page opens.
Guide and interpretation
Formula
It uses the amortization formula M = P x r x (1 + r)^n / ((1 + r)^n - 1), where r is the monthly rate and n is the number of payments.
How to interpret it
Compare the monthly payment with available cash flow, then compare total interest across terms before choosing a loan.
Common mistakes
Do not compare only the monthly payment. A longer term can look affordable while increasing total interest materially.
Limits
The result excludes taxes, fees, insurance, prepayment rules and variable-rate changes unless you add those costs to the inputs.
FAQ
Are values stored?
No. CalcHarbor calculates in the browser and does not store calculator inputs or results.
Can I use this for final financial decisions?
Use the result as a planning signal. Confirm legal, tax, credit and accounting decisions with a qualified professional.