Bank Loan Calculator

Calculate your monthly loan payments, total interest, and total payment based on loan amount, interest rate, and term.

isCalculator Editorial Team Published by:
Reviewed by: Review Board
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How to use this tool?

This calculator estimates your monthly loan payments using the standard amortization formula. Follow these steps:

  1. Enter Loan Amount ($) – Type the total amount you want to borrow (e.g., 10000). Must be a positive number.
  2. Enter Annual Interest Rate (%) – Input the yearly interest rate (e.g., 5 for 5%). Use decimals for partial rates (e.g., 4.5).
  3. Enter Loan Term (Years) – Specify the repayment period in whole years (minimum 1).
  4. Click "Calculate" – Press the button or hit Enter in any field to see results.

Outputs explained:

  • Monthly Payment – Fixed amount due each month.
  • Total Interest – Total cost of borrowing over the loan term.
  • Total Payment – Sum of all monthly payments (principal + interest).

Note: All values are in US dollars. The calculator assumes equal monthly payments and a fixed interest rate.

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Frequently Asked Questions

The monthly payment is calculated using the formula M = P [ i(1+i)^n ] / [ (1+i)^n - 1 ], where P is the loan amount, i is the monthly interest rate (annual rate divided by 12), and n is the number of monthly payments.

If the interest rate is 0%, the monthly payment is simply the loan amount divided by the number of months, and total interest is zero.

Yes, this calculator works for any fixed-rate loan, such as personal loans, auto loans, or mortgages, as long as the payments are made monthly.

Reviewed by Experts

Carlos Bicho

Carlos Bicho

Financial Advisor

Private Banker & Financial Advisor

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Danilson Melicio

Danilson Melicio

Financial Advisor

Financial Markets Investor

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Eurico José Kiala

Eurico José Kiala

Mathematician

Teacher

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Francisco Saramango

Francisco Saramango

Board Financial Advisor

Financial Management and Accounting, Financial management and accounting

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Juliana Mayorca

Juliana Mayorca

Financial Advisor

Board-Level Advisor

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