Finance Calculators
Loan Calculator
Estimate fixed monthly loan payments, total interest, total repayment, and a reconciled amortization schedule.
Fixed-rate installment loan estimate
Enter principal, a fixed nominal annual rate, and the exact number of monthly payments.
Amount borrowed before interest. Fees are not included in this calculator.
Nominal annual rate divided by 12 for the monthly schedule.
Use a whole number from 1 to 600 months.
Calculation assumptions
- *Models a fixed-rate, fully amortizing loan with payments at the end of each month.
- *The nominal annual interest rate is divided by 12; daily interest and irregular periods are not modeled.
- *Internal calculations remain unrounded. Currency displays use cents, and the final payment is reconciled to a zero balance.
- *Fees, taxes, insurance, prepayment penalties, balloon payments, and variable rates are excluded.
Enter your values and press Calculate Loan Payment.
Results and breakdowns will appear here after a valid calculation.
Fixed-rate loan payment method
The regular month-end payment is M = P x r x (1 + r)^n / ((1 + r)^n - 1), where P is principal, r is the nominal annual rate divided by 12, and n is the number of monthly payments. At a zero rate, M = P / n.
Each month, interest equals the unrounded opening balance multiplied by r. The rest of the payment reduces principal. The final payment is adjusted by any sub-cent remainder so total principal paid equals the original principal and the ending balance is zero.
Verified payment example
For a $10,000 loan at 6% for 36 monthly payments, the regular payment is about $304.22. The first month includes $50.00 interest and about $254.22 principal, leaving about $9,745.78.
The complete unrounded schedule produces about $951.90 in total interest and $10,951.90 in total payments. Displayed rows are rounded to cents, so use the reconciled totals rather than adding rounded row values.
What this loan estimate does not include
This calculator does not determine approval, eligibility, affordability, or a legally disclosed APR. It does not model daily accrual, late fees, origination fees, skipped payments, extra payments, penalties, variable rates, or balloon payments.
Calculation methodology is maintained by Calzivo and checked against the sources listed below. Actual lender figures may differ, so review the note, payment schedule, and official disclosures before relying on an estimate.
Quick answers
What this calculator answers
- Result: Estimates the regular payment, first-payment split, total interest, total payments, and final reconciled payment.
- Method: Uses a fixed-rate month-end amortization schedule with unrounded internal values.
- Scope: Educational estimate for a standard installment loan, not a lender quote, approval, eligibility result, or APR disclosure.
- Compare fees: Use the APR Calculator when an upfront finance charge changes the amount financed. APR Calculator
Transparency note
Accuracy and limitations
Calzivo tools are built for practical estimates, conversions, and checks. Some tools use standard formulas or simplified assumptions, and results can be affected by input accuracy, rounding, units, local rules, or changing official requirements.
Finance results are planning estimates, not financial advice. Actual costs or returns can change because of fees, taxes, rates, timing, provider rules, and personal circumstances.
Reference check
Sources and references
These references provide background context for the topic. They do not replace official advice or documents for personal decisions.
- What is amortization and how could it affect my auto loan?
Consumer Financial Protection Bureau
- Auto loans key terms
Consumer Financial Protection Bureau
How to Use This Tool
Use these steps to enter the right inputs and interpret the result correctly.
Enter the principal actually borrowed.
Enter the fixed nominal annual rate and term in whole months.
Compare the regular payment, total interest, and amortization schedule with official lender disclosures.
Related Tools
Other helpful tools in the Finance Calculators category.
EMI Calculator
Estimate a fixed monthly installment, scheduled interest, total payments, and reconciled amortization.
Loan Eligibility Estimate
Model borrowing capacity from income, existing debt payments, a user-entered ratio, rate, and term.
Mortgage Calculator
Estimate mortgage principal and interest plus user-entered tax, insurance, PMI, and HOA costs.
APR Calculator
Estimate APR, amount financed, finance charge, and payments from a stated rate and upfront charge.
Interest Calculator
Compare simple and compound interest from principal, annual rate, time, and compounding frequency.
Related Guides
Background reading and explanations related to Loan Calculator.
How to Calculate EMI (Step-by-Step + Real Loan Examples)
A step-by-step guide to loan math.
APR vs Interest Rate Explained
Understand interest rate, APR, fees, and why monthly payment still matters.
Loan Eligibility Factors Explained
See how income, obligations, tenure, rates, and lender assumptions affect eligibility estimates.
Frequently Asked Questions
Common questions about Loan Calculator and how to read the result.
Is the loan payment the same as APR?
No. This payment uses the stated interest rate and excludes fees. APR is a broader annualized borrowing-cost measure that may include eligible finance charges.
Why can the final payment differ slightly?
The regular payment is calculated with more precision than the displayed cents. The last payment absorbs any remaining sub-cent balance so principal and interest reconcile exactly.
Does the schedule support zero interest?
Yes. At 0%, principal is divided evenly across the selected number of monthly payments and total interest is zero.
Does this include extra payments?
No. This version models only the scheduled month-end payment and does not assume prepayment penalties or extra principal payments.
Is this a loan offer or approval?
No. It is an educational calculation. A lender determines eligibility and provides official rates, fees, terms, and disclosures.