Loan Calculator
Estimate monthly payments and interest.
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📝 About Loan Calculator
The Loan Calculator estimates your fixed monthly payment, total interest and total repayment from three inputs: the loan amount, the annual interest rate and the term in months. Results update instantly as you change any value, which makes it easy to compare scenarios.
Use it to compare offers for a personal loan, car loan or mortgage, to see how a shorter term raises the monthly payment but cuts total interest, or to check how much a one-point rate change really costs.
The tool uses the equal-installment (annuity) method, where every monthly payment is the same and covers both interest and principal: payment = P × r ÷ (1 − (1 + r)^−n), with r as the monthly rate (annual rate ÷ 12) and n as the number of months. Early payments are mostly interest, later ones mostly principal. Other methods, such as equal-principal repayment, start with higher payments and lower total interest, and interest-only loans are not covered here. Figures are estimates for reference only and are not financial advice; actual terms depend on your lender’s fees and rules.
📘 How to use
- 1
Enter the loan amount
Type the principal you plan to borrow.
- 2
Set rate and term
Enter the annual interest rate in percent and the term in months.
- 3
Review the results
Check the monthly payment, total interest and total repayment shown below.
❓ FAQ
Which repayment method does this calculator use?
It uses equal monthly installments (annuity), where each payment is the same amount. Equal-principal and interest-only methods are not supported.
How do I enter a 30-year mortgage?
The term is in months, so enter 360 for 30 years or 240 for 20 years.
What happens if I enter a 0% rate?
The loan amount is simply divided evenly by the number of months, and total interest is zero.
Will my bank charge exactly this amount?
Not necessarily. Fees, insurance, day-count rules and rate changes can make actual payments differ, so use the result as an estimate only.