Loan Calculator – Calculate Monthly Loan Payments, Interest & Total Loan Cost (USA & Canada)
Whether you're planning to borrow money for a personal expense, purchase a vehicle, finance your education, consolidate debt, or compare loan offers, understanding the true cost of borrowing is essential. A loan isn't just about the amount you receive—it's also about the interest you pay, the repayment period, fees, and the total amount you'll repay over time.
Our Loan Calculator helps borrowers in both the United States and Canada estimate monthly payments, total interest, total repayment amount, and the overall cost of a loan in seconds. Unlike basic calculators that only estimate a monthly payment, our calculator supports the three most common interest calculation methods used by lenders:
- Amortized Loans
- Simple Interest Loans
- Compound Interest Loans
Simply enter your loan amount, annual interest rate, and repayment term to instantly calculate your monthly payment. You can switch between calculation methods to match your lender's loan structure and view a detailed amortization schedule showing exactly how much principal and interest you pay over the life of the loan.
Whether you're comparing lenders or planning your finances, this calculator provides the insights you need to borrow with confidence.
What Is a Loan?
A loan is money borrowed from a financial institution or lender that must be repaid over an agreed period, usually with interest.
The amount you borrow is called the principal, while the fee charged by the lender is called interest. Loans are repaid according to a schedule that specifies how much you must pay and when payments are due.
Loans can be obtained from:
- Banks
- Credit unions
- Online lenders
- Finance companies
- Government lending programs
- Private lenders
The total cost of a loan depends on several factors, including:
- Loan amount
- Interest rate
- APR (Annual Percentage Rate)
- Loan term
- Repayment frequency
- Fees and charges
- Interest calculation method
Understanding these factors before borrowing can save you thousands of dollars over the life of a loan.
How Does a Loan Calculator Work?
A loan calculator estimates how much you'll pay over the life of your loan based on your loan details.
Simply enter:
- Loan amount
- Interest rate
- Loan term
- Interest calculation method
The calculator instantly displays:
- Monthly payment
- Total interest paid
- Total repayment amount
- Principal vs. interest breakdown
- Complete amortization schedule
- Interactive repayment chart
Changing any value updates the results in real time, making it easy to compare different loan scenarios.
Types of Loans
Different loans are designed for different financial needs.
Personal Loans
Personal loans are one of the most flexible borrowing options. Most are unsecured, meaning no collateral is required.
Common uses include:
- Debt consolidation
- Medical expenses
- Weddings
- Vacations
- Emergency expenses
- Home improvements
Typical repayment terms range from 1 to 7 years.
Auto Loans
Auto loans help finance new or used vehicles.
The vehicle serves as collateral, allowing lenders to offer lower interest rates than unsecured loans.
Loan terms typically range from 36 to 84 months.
Student Loans
Student loans help cover tuition, books, housing, and education-related expenses.
Government student loans often offer lower interest rates and flexible repayment options compared to private lenders.
Mortgage Loans
Mortgage loans finance the purchase of residential property.
These loans generally have the longest repayment periods, commonly ranging from 15 to 30 years in the United States and up to 25 years or more in Canada.
Business Loans
Business loans help entrepreneurs finance:
- Equipment
- Inventory
- Working capital
- Expansion
- Commercial property
Business loans may have fixed or variable interest rates depending on the lender.
Understanding Loan Interest
Interest is the price you pay for borrowing money.
Lenders calculate interest using different methods, which directly affect how much you'll ultimately repay.
Our calculator supports the three most common methods.
Simple Interest Loans
Simple interest is calculated only on the original loan amount.
Interest does not accumulate on previous interest charges.
Formula:
Interest = Principal × Rate × Time
Example:
- Loan Amount: $20,000
- Interest Rate: 6%
- Loan Term: 5 years
- Interest: $20,000 × 6% × 5 = $6,000
- Total Repayment: $26,000
Simple interest loans are common for:
- Short-term loans
- Some personal loans
- Certain vehicle financing
- Private lending agreements
Compound Interest Loans
Compound interest means interest is charged on both:
- The original principal
- Previously accumulated interest
Because interest earns additional interest over time, compound loans generally cost more than simple-interest loans when all other factors are equal.
Formula:
A = P(1 + r/n)^(nt)
Where:
- A = Final amount
- P = Principal
- r = Annual interest rate
- n = Number of compounding periods
- t = Loan term in years
Compounding may occur:
- Annually
- Semi-annually
- Quarterly
- Monthly
- Weekly
- Daily
The more frequently interest compounds, the greater the total borrowing cost.
Amortized Loans
Most consumer loans are amortized.
Instead of paying interest separately, each monthly payment contains both:
- Principal
- Interest
Although the payment stays the same each month, the portion allocated to principal gradually increases while the interest portion decreases.
Examples include:
- Personal loans
- Auto loans
- Student loans
- Mortgages
How Monthly Loan Payments Are Calculated
For amortized loans, monthly payments are calculated using the standard amortization formula:
M = P × [r(1+r)^n] ÷ [(1+r)^n – 1]
Where:
- M = Monthly payment
- P = Loan principal
- r = Monthly interest rate
- n = Total number of payments
This formula ensures your loan balance reaches zero by the end of the repayment term.
Our calculator performs these calculations instantly and generates a full amortization schedule.
Loan Amortization Schedule
An amortization schedule shows exactly how each payment is applied.
For every payment, you'll see:
- Payment number
- Payment amount
- Principal paid
- Interest paid
- Remaining balance
This helps borrowers understand how quickly their loan balance decreases and how much interest they pay over time.
APR vs Interest Rate
Many borrowers confuse APR with the interest rate.
Interest Rate
The interest rate represents only the cost of borrowing money.
APR (Annual Percentage Rate)
APR includes:
- Interest rate
- Origination fees
- Certain lender charges
- Other mandatory financing costs
Because APR reflects the true cost of borrowing, it is the best metric for comparing loan offers.
Two loans may advertise the same interest rate but have very different APRs due to lender fees.
Fixed vs Variable Interest Rates
Fixed Rate Loans
The interest rate remains unchanged throughout the loan term.
Advantages:
- Predictable payments
- Easier budgeting
- Protection against rising interest rates
Variable Rate Loans
The interest rate changes based on market conditions.
Advantages:
- Lower starting rates
- Potential savings if rates fall
Risks:
- Higher future payments
- Increased borrowing costs if interest rates rise
Variable-rate loans are common in Canada and certain U.S. lending products.
Factors That Affect Your Loan Payment
Several factors determine your monthly payment:
- Loan amount
- Interest rate
- Credit score
- Loan term
- Down payment (for secured loans)
- Type of loan
- Interest calculation method
- Fees included in financing
Even a small difference in interest rate can significantly change the total amount repaid over several years.
How to Lower the Cost of Your Loan
Borrowers can reduce total interest by:
- Improving their credit score before applying.
- Comparing multiple lenders and credit unions.
- Shopping using APR instead of the advertised interest rate.
- Choosing the shortest affordable loan term.
- Making additional principal payments whenever possible.
- Avoiding unnecessary loan insurance or add-on products.
- Refinancing when interest rates decline.
Loan Calculator Example
Suppose you borrow $30,000 for 5 years at 6.5% APR.
The calculator estimates:
- Monthly Payment: approximately $587
- Total Interest: approximately $5,200
- Total Repayment: approximately $35,200
If you shorten the loan to 4 years, your monthly payment increases, but you save hundreds—or even thousands—of dollars in total interest.
Why Use Our Loan Calculator?
Our calculator is designed for accuracy, simplicity, and flexibility.
Features include:
- Supports amortized, simple, and compound interest calculations
- Interactive amortization schedule
- Monthly payment estimates
- Principal vs. interest breakdown
- Total interest calculation
- Total repayment estimate
- Visual repayment charts
- Works for borrowers in the United States and Canada
- Mobile-friendly and completely free
Whether you're applying for a personal loan, financing a vehicle, consolidating debt, or comparing loan offers, our calculator helps you make informed borrowing decisions.