Loan Calculator — Calculate Your Monthly Payment Instantly
Loan Calculator
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About Loan Calculator
What Is a Loan Calculator?
A loan calculator is a financial tool that helps you estimate monthly repayments, total interest paid, and the full repayment cost for any type of borrowing — from a simple personal loan to a mortgage, auto loan, or business loan.
The math behind the calculation is the same standard amortization formula regardless of what the loan is for.
The Loan Payment Formula Explained
Every monthly payment figure this calculator produces is derived from this formula:
Where:
M = Monthly payment
P = Principal loan amount
r = Monthly interest rate (annual rate ÷ 12)
n = Total number of payments (loan term in months)
Example: For a $300,000 loan at 6.5% annual interest over 30 years:
P = $300,000
r = 6.5% ÷ 12 = 0.5417%
n = 30 × 12 = 360 months
M ≈ $1,896/month
On this example loan, roughly 56% of every dollar repaid goes toward interest, not principal.
How to Use This Loan Calculator
- Enter the loan amount (P) — how much you need to borrow
- Enter the annual interest rate — the calculator converts it to a monthly rate automatically
- Set the loan term in years
- Click Calculate to see your monthly payment, total payment, and total interest
Try modeling a shorter term or a smaller loan amount to see how much interest you could save over the life of the loan.
Understanding Your Amortization
Every payment on an amortizing loan is made up of two parts:
- Principal — the portion reducing your loan balance
- Interest — the cost of borrowing
In the early months of any loan, the majority of each payment goes toward interest. Over time, as your balance shrinks, more of each payment reduces principal. This is why paying extra early in a loan term saves disproportionately large amounts of interest.
Key Financial Concepts Every Borrower Should Know
Loan-to-Value (LTV): Your loan balance divided by the asset's value. A lower LTV generally means better loan terms.
Debt-to-Income Ratio (DTI): Your total monthly debt payments divided by your gross monthly income. Lenders use this to judge how much more debt you can reasonably take on.
Annual Percentage Rate (APR): The true annual cost of borrowing, including certain fees — a more complete picture than the headline interest rate alone.
Amortization: The process of paying down a loan through regular fixed payments, gradually shifting from mostly-interest to mostly-principal over time.
Frequently Asked Questions
What's the difference between a loan calculator and a mortgage calculator?
A loan calculator applies to any type of borrowing. A dedicated mortgage calculator usually adds extra inputs like property taxes, insurance, and down payment. The underlying amortization formula is the same.
How accurate are online loan calculators?
Very accurate for fixed-rate loans. Variable-rate products introduce uncertainty since future rates are unknown. This calculator shows a current-rate scenario based on what you enter.
Can I use this loan calculator for a car loan?
Yes. Enter the vehicle price minus your down payment as the loan amount, your lender's annual rate, and your term in years. For a car-specific version with additional fields, use our Car Payment Calculator or Auto Loan Calculator.
What is EMI?
EMI stands for Equated Monthly Installment — the same concept as a monthly loan payment, commonly used in India, Pakistan, Bangladesh, and the Philippines. It's calculated with the same amortization formula this calculator uses.
Does paying extra reduce my loan term?
Yes, significantly. Extra payments reduce your principal faster, which reduces both your total term and total interest paid over the life of the loan.
Start Calculating
Use the calculator at the top of this page to get your personalized loan estimate in seconds. Enter your loan amount, interest rate, and term to see your monthly payment, total interest, and total repayment cost.
All calculations are for illustrative purposes. Actual loan terms are set by your lender and may include fees, insurance, and other costs not reflected in this basic estimate. Consult a licensed financial advisor or loan officer before making borrowing decisions.