Finance Utility

Loan Interest Calculator

Estimate your monthly payment, total interest and repayment schedule from a loan amount, rate and term.

Monthly payment Calculate payments for amortized, equal-principal and interest-only loans.
Compare repayment types See how payment pressure and total interest change by repayment method.
Export schedule Review principal, interest and balance by month, then download a CSV file.
Loan Calculator

Loan details

Enter the amount, rate, term and repayment type to estimate the schedule.

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Calculation Result

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Enter loan details on the left to show the summary and monthly schedule here.

Repayment Types

Repayment Type Comparison

The same amount and rate can produce different monthly pressure and total interest.

Amortized payment

The payment stays almost even each month, making budgeting easier. This is common for mortgages.

Equal principal

You repay the same principal every month, so interest gradually falls. Early payments are higher but total interest is usually lower.

Interest-only / balloon

You pay interest during the term and repay principal at maturity. A clear payoff plan is important.

Loan Interest Calculator Guide

What is this tool?

A free finance utility for estimating monthly payments, total interest and repayment schedules before taking a loan.

Supported features

  • Country-specific currency and quick amount presets
  • Amortized, equal-principal and interest-only calculations
  • Monthly principal, interest and balance schedule
  • CSV schedule download
What is an amortized payment?

It keeps the monthly total of principal plus interest nearly constant. Early payments include more interest, then shift toward principal over time.

What is equal-principal repayment?

The principal is divided evenly across the term. As the balance falls, interest falls too, so payments gradually decrease.

Important note

This calculator is for reference only. Actual loan conditions may differ due to lender methods, discounts, fees, taxes, grace periods or prepayment rules.