Enter the loan
Add the amount borrowed, annual fixed interest rate, and repayment term.
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Loan Calculator
Estimate a fixed-rate loan payment, total interest, payoff time, and amortization schedule — then see what an extra monthly principal payment could change.
Loan summary
Ready to calculateMonthly payment$500.95Scheduled principal + interest
Total interest$5,056.96Estimated over payoff
Total paid$30,056.96Principal + interest
Payoff time5 yr60 payments
Where the money goeswhole-loan totals
| # | Month | Payment | Principal | Interest | Extra | Balance |
|---|---|---|---|---|---|---|
| 1 | Sep 2026 | $500.95 | $344.70 | $156.25 | $0.00 | $24,655.30 |
Runs locally in your browserNo signup or loan applicationFixed-rate amortization model
How to use
How to Use Motricialy Loan Calculator
Test extra payments
Optionally add a recurring monthly principal payment to compare payoff savings.
Review the schedule
Check payment, interest, payoff time, and the month-by-month balance, then export CSV if useful.
Key features
Key Features
Monthly payment estimate
Calculate a level scheduled payment for a fixed-rate, fully amortizing installment loan.
Total interest clarity
See the estimated interest cost over the full payoff instead of only the monthly number.
Extra-payment savings
Compare recurring extra principal against the baseline term and see interest and time saved.
Full amortization schedule
Inspect payment, principal, interest, extra principal, and remaining balance month by month.
CSV schedule export
Download the amortization table for further review or spreadsheet modeling.
Private browser calculation
Your loan inputs and calculations stay in the current browser tab and are not uploaded by the tool.
Understand the result
How Fixed-Rate Loan Amortization Works
A fixed-rate amortizing loan uses the principal, monthly interest rate, and total number of payments to determine a level scheduled payment. Early payments usually contain more interest because the outstanding balance is larger; later payments shift more toward principal.
An extra principal payment can reduce the balance earlier, which may reduce future interest and shorten payoff time. The exact effect depends on lender rules, payment timing, prepayment penalties, fees, and how the lender applies additional funds.
If you export the schedule and want to inspect or annotate it further, you can open the data in Motricialy’s Online Excel Editor. This calculator itself remains a focused estimate rather than a lender quote.
Questions
Loan Calculator FAQ
How is the monthly loan payment calculated?
For a fixed-rate amortizing loan, the calculator uses the principal, annual rate divided into a monthly rate, and the number of monthly payments. At 0% interest, the principal is divided evenly across the term.
Do extra payments reduce loan interest?
They can when the lender applies the extra amount directly to principal. A lower balance can reduce future interest and shorten the payoff period, but actual lender rules and payment timing matter.
Does this include taxes, insurance, PMI, or lender fees?
No. The model estimates principal and interest for a fixed-rate installment loan. It excludes taxes, insurance, PMI, origination charges, escrow, late fees, and other lender-specific costs.
Can I use it for a mortgage, auto loan, or personal loan?
You can use it as a principal-and-interest estimate when the loan is fixed-rate and amortized with monthly payments. Product-specific costs and rules are not included.
Is my loan information uploaded?
No. The calculation and amortization schedule are produced locally in the browser by this tool. No account or loan application is created.
Related tools
Related Tools
Estimate, not a loan offer. Results assume a fixed annual rate, monthly amortization, and the extra-payment behavior shown. Real lender schedules may differ because of fees, day-count conventions, payment timing, rounding, insurance, taxes, or prepayment rules.