Introduction
This student loan calculator helps you figure out exactly what your loans will cost and how to pay them off faster. Whether you have one loan or several, you can use it to find your monthly payment, total interest, and payoff date in seconds. The tool has four modes: Simple lets you solve for any missing variable like payment amount, loan balance, interest rate, or loan term. Repayment Strategy shows you how extra payments can save you money and cut years off your debt. Multiple Loans combines all your student loans and compares the avalanche and snowball payoff methods. Amortization gives you a full month-by-month schedule so you can see exactly where each dollar goes.
Student loans are one of the biggest financial commitments most people take on. The average borrower pays thousands of dollars in interest alone over the life of a standard 10-year repayment plan. Even small extra payments each month can make a big difference. For example, adding just $100 per month to a $35,000 loan at 6.8% interest can save you nearly $4,000 in interest and help you pay off the loan more than two years early. Use this calculator to enter your own numbers and build a repayment plan that fits your budget.
How to Use Our Student Loan Calculator
Enter your student loan details below to calculate your monthly payment, total interest, payoff date, and explore strategies to pay off your loans faster. This calculator has four modes to help you plan your repayment.
Simple Mode – Solve for Any Variable: Choose what you want to calculate from the dropdown menu: monthly payment, loan balance, interest rate, or loan term. Fill in the three fields you already know, and the calculator will solve for the missing value. For example, select "Monthly Payment," then enter your loan balance, interest rate, and loan term in years to see what you will owe each month.
Loan Balance: Enter the total amount you currently owe on your student loan in dollars. This is the principal amount before any interest is added.
Interest Rate (APR): Enter the annual percentage rate on your loan. You can find this number on your loan statement or promissory note. Type it as a percentage, such as 6.8 for 6.8%. If you want to understand how APR differs from other rate measures, our APR Calculator can help you compare loan costs.
Loan Term (Years): Enter the number of years you have to repay your loan. A standard federal student loan term is 10 years, but yours may be different.
Monthly Payment: Enter your monthly payment amount if you are solving for a different variable. Leave this blank if you want the calculator to figure it out for you.
Repayment Strategy Mode: Enter your loan balance, interest rate, and loan term, then use the slider or type in an extra monthly payment amount to see how paying more each month speeds up your payoff. You can also enter an extra annual lump sum payment and a one-time extra payment. The calculator compares your original schedule side by side with the accelerated schedule and shows you how much interest and time you will save.
Extra Monthly Payment: Enter any additional amount you can pay each month on top of your required payment. Use the slider to quickly adjust this amount and see results update in real time.
Extra Annual Payment: Enter a lump sum amount you plan to pay once per year, such as from a tax refund or bonus. This amount is applied to your principal once every 12 months.
One-Time Extra Payment: Enter a single lump sum you want to apply to your principal right away. This reduces your balance immediately before regular payments begin.
Multiple Loans Mode: Add each of your student loans by entering a name, balance, interest rate, and term for every loan. Choose either the Avalanche strategy, which targets the highest interest rate first, or the Snowball strategy, which targets the lowest balance first. Enter your extra monthly budget, which is the additional money beyond minimum payments you can put toward your loans, then click "Calculate" to see your total balance, weighted average rate, total minimum payment, payoff order, and a chart showing all loan balances over time.
Payoff Strategy: Select "Avalanche" to save the most money on interest by paying off high-rate loans first, or select "Snowball" to build momentum by clearing small balances first. For a deeper dive into these methods, try our dedicated Debt Avalanche Calculator or Debt Snowball Calculator.
Extra Monthly Budget: Enter the total extra amount you can afford to pay each month across all your loans. This money goes toward the priority loan after all minimum payments are made.
Amortization Mode: Enter your loan balance, interest rate, loan term, and any extra monthly payment, then click "Generate Schedule" to see a full payment-by-payment breakdown. View the schedule as a monthly table or a yearly summary using the toggle buttons. The bar chart shows how much of each year's payments go toward principal versus interest, and the results display your monthly payment, total interest, total amount paid, and estimated payoff date.
Student Loan Calculator
A student loan is money you borrow to help pay for college or other education after high school. Unlike scholarships or grants, loans must be paid back with interest — a fee the lender charges you for borrowing the money. Interest is shown as a yearly percentage called the APR (Annual Percentage Rate). The higher the rate, the more you pay over time.
How Student Loan Payments Work
When you make a monthly payment on a student loan, part of that payment goes toward the principal (the original amount you borrowed) and part goes toward interest. In the early years of your loan, most of your payment covers interest. As time goes on, more of each payment goes toward paying down the principal. This process is called amortization. To see how interest compounds and grows over time, you can also explore our Compound Interest Calculator.
Types of Student Loans
Federal student loans come from the government and usually have lower, fixed interest rates. Common types include Direct Subsidized Loans (where the government pays the interest while you're in school) and Direct Unsubsidized Loans (where interest starts building right away). Private student loans come from banks or other lenders and often have higher or variable interest rates. Most financial experts recommend using federal loans first before turning to private loans.
Paying Off Your Loans Faster
The standard repayment plan for federal student loans is 10 years, but you can pay them off sooner by making extra payments. Even a small extra amount each month can save you hundreds or thousands of dollars in interest. Two popular strategies for paying off multiple loans faster are:
- Avalanche Method: Pay extra toward the loan with the highest interest rate first. This saves the most money overall.
- Snowball Method: Pay extra toward the loan with the smallest balance first. This gives you quick wins and can help you stay motivated.
Key Terms to Know
- Loan Balance: The total amount you still owe.
- Loan Term: How long you have to pay back the loan, usually measured in years.
- Monthly Payment: The fixed amount you pay each month, calculated based on your balance, interest rate, and loan term.
- Total Interest Paid: The full amount of interest you pay over the life of the loan. On a $35,000 loan at 6.8% for 10 years, for example, you would pay over $13,000 in interest alone.
- Weighted Average Rate: When you have multiple loans at different rates, this single number shows your overall average rate, giving more weight to larger loans.
Why This Matters
Understanding your student loans before and after you borrow helps you make smarter decisions. Knowing your monthly payment ahead of time lets you plan a realistic budget. Seeing how much interest you'll pay over the full loan term can motivate you to borrow less or pay extra when you can. Even an extra $50 or $100 per month can cut years off your repayment and save you a significant amount of money. Once your student loans are under control, you can shift focus to other financial goals — use our Retirement Calculator or 401k Calculator to start planning for the future. If you're also managing a car payment, our Auto Loan Calculator can help you see how that fits into your budget. To get a full picture of your financial health, check out our DTI Calculator to see how your total debt compares to your income, or use our Net Worth Calculator to track your overall progress. If you're carrying credit card balances alongside your student loans, our Credit Card Payoff Calculator and Minimum Payment Calculator can help you tackle that debt as well. You can also use the Rule of 72 Calculator to quickly estimate how fast your savings or investments can double once you free up money from loan payments.