What is a Loan Calculator?
The Calnovix Loan Calculator helps you estimate monthly payments for common installment loans such as auto, personal, business, RV, and home financing. Enter the loan amount, term, and annual interest rate to see payment, total cost, and an amortization schedule.
Formula
For a fixed-rate amortizing loan, the monthly payment is calculated with the standard formula: M = P × r(1+r)^n ÷ ((1+r)^n − 1), where P is principal, r is the monthly interest rate, and n is the number of months. If the rate is zero, payment is simply principal ÷ months.
How it works
- Enter the loan amount you plan to borrow.
- Set the loan term in years or months.
- Enter the annual interest rate (APR).
- Optionally add an extra monthly payment toward principal.
- Review monthly payment, total interest, total cost, and the amortization schedule.
Worked examples
Personal loan
$10,000 borrowed for 5 years at 10% APR.
Monthly payment is about $212.47, with roughly $2,748 total interest over the full term.
Auto loan comparison
$35,000 at 5% APR for 3 years vs 5 years.
The 3-year term has a higher monthly payment but saves thousands in interest versus 5 years.
Professional tips
- Shorter terms usually mean higher monthly payments but less total interest.
- Even a small APR change can meaningfully affect large loans.
- Use the amortization table to see when principal starts outweighing interest.
- This estimate does not replace a lender’s official quote.