Loan Calculator estimates the fixed monthly payment, total paid, and total interest for an amortizing loan. It is built for quick planning around personal loans, auto loans, equipment loans, and other fixed-rate borrowing where principal, interest rate, and term drive the payment. The result shows how principal, rate, and term interact, but it does not include every possible APR component, origination fee, insurance product, tax effect, late fee, or prepayment rule. Use it to compare scenarios before reviewing actual lender disclosures.
Enter values in the left panel, keep units explicit, run the calculation, then copy or share the result. Invalid fields are highlighted immediately.
How to use this tool
Enter the loan principal, annual interest rate, and term in years.
Confirm whether the rate you are entering is the nominal interest rate or an APR-like figure from a lender disclosure.
Run the calculator and review monthly payment, total paid, and total interest.
Rerun with a shorter term, longer term, and higher-rate case to see how sensitive the payment is.
Loan Calculator
Calculate monthly payments and total interest for loans.
Results
Loan Amount: $20,000.00
Interest Rate: 5.00%
Term: 5.0 years (60 payments)
Monthly Payment: $377.42
Total Paid: $22,645.48
Total Interest: $2,645.48
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Formula or method
The monthly payment uses the standard amortizing loan payment formula.
Principal is the amount borrowed before interest and fees.
The interest rate is converted to a monthly rate for monthly payments.
The term controls the number of payments; a longer term usually lowers monthly payment but increases total interest.
Worked example
Estimating a fixed-rate loan payment
Loan amount: $20,000
Annual interest rate: 8%
Term: 5 years
Result: The calculator returns the estimated monthly payment plus total paid and total interest over 60 payments.
A shorter term would raise the monthly payment but usually reduce total interest. A higher rate raises both the payment and total interest.
How to interpret the result
The payment estimate shows how principal, nominal rate, and term interact for a fixed amortizing loan.
Monthly payment is the scheduled amount needed to amortize the entered principal over the selected term.
Total interest is the extra amount paid beyond principal if every payment is made as scheduled.
APR, fees, taxes, credit products, early repayment rules, and local lending rules can make a real offer differ from this estimate.
Compare multiple scenarios before deciding whether the payment fits your budget.
Common mistakes
Entering a monthly rate in the annual interest rate field.
Comparing only monthly payment and ignoring total interest.
Forgetting origination fees, taxes, insurance, or required add-ons.
Assuming early repayment is always free or applied immediately to principal.
Review note and limitations
Method - standard fixed-rate amortizing loan formula.
Does not include every fee, tax, insurance product, prepayment rule, local lending convention, or provider term.
Not a binding quote or credit decision.
Educational and planning use only. Confirm APR, fees, repayment rules, taxes, and legal obligations with the lender or a qualified advisor before making a borrowing decision.
FAQ
Is this loan calculator the same as an APR calculator?
No. It estimates payment from principal, rate, and term. APR can include fees and other finance charges that are not represented unless you model them separately.
Why does a longer loan term cost more interest?
A longer term keeps the balance outstanding for more months, so interest has more time to accrue even if the monthly payment is lower.
Can I use this for auto or personal loans?
Yes, if the loan behaves like a fixed-rate amortizing loan. Check lender documents for fees, taxes, prepayment rules, and payment timing.
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