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Loan Calculator

Calculate monthly loan payments, total interest, and view a full amortization schedule with pie chart visualization

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About This Tool

The Loan Calculator computes monthly payments, total payment, and total interest for equal-installment (amortizing) loans. It provides a pie chart visualization of the principal-to-interest ratio and a full amortization schedule with monthly and yearly views, helping you understand the complete repayment structure. All operations are performed locally in your browser — your financial data is never uploaded to any server.

Key Features

Quick Preview

Use Cases

calculator

Frequently Asked Questions

What repayment method does this calculator use?

This calculator uses the equal-installment (amortizing) method, where the monthly payment amount is fixed, with the principal portion increasing and the interest portion decreasing each month. This is the most common repayment method for mortgages and consumer loans.

What is the amortization schedule for?

The amortization schedule details each period's payment amount, principal portion, interest portion, and remaining balance, helping you understand the full repayment picture. It supports monthly and yearly views for flexible inspection.

What does the pie chart show?

The pie chart visually displays the proportion of principal and interest in the total repayment amount. It helps you quickly assess how much of your total payment goes toward interest, aiding in loan cost evaluation.

Can I enter the loan term in months?

Yes. The loan term supports both year and month input modes. Click the toggle buttons below the input field to switch between the two modes, accommodating different loan plan conventions.

How does the calculator handle a zero interest rate?

When the annual interest rate is zero, the monthly payment equals the loan amount divided by the total number of months — essentially an interest-free installment. The calculator handles this case specially to ensure correct results.