Student Loan Calculator

Use this calculator to estimate student loan payments, total interest, total repayment, and the effect of extra monthly payments. It helps you plan repayment using balance, rate, term, and optional extra payment assumptions.

What this calculator does

The student loan calculator estimates repayment cost.

It uses:

• loan balance
• annual interest rate
• repayment term
• extra monthly payment

The result shows estimated monthly payment, total interest, and payoff time with extra payments.

How to use the student loan calculator

Enter the current loan balance, annual interest rate, repayment term in years, and any extra monthly payment. The calculator estimates the standard payment and then simulates the effect of paying extra.

Actual student loan programs may have income-driven plans, subsidies, deferment, forgiveness, or special rules.

Student Loan Formula

Monthly payment = P x [r(1+r)^n] / [(1+r)^n - 1]

Extra payment payoff is simulated month by month

Example calculation

If:

• Loan balance = 30,000
• Annual interest rate = 6%
• Term = 10 years
• Extra payment = 100

Then:

Standard payment is calculated over 120 months

The extra payment is then added monthly to estimate a faster payoff time.

What is a student loan?

A student loan is borrowing used to pay for education costs. Repayment terms can vary widely depending on country, lender, program type, and repayment plan.

Some student loans have protections or rules that ordinary loans do not.

Interpreting your result

Use the result as a baseline repayment estimate. If your loan has income-based repayment or forgiveness options, compare those separately.

When to use this calculator

Use this calculator when you want to:

• estimate student payments
• test extra payments
• review interest cost
• plan repayment budget

Common mistakes

Common mistakes include:

• ignoring special repayment plans
• excluding accrued interest
• forgetting deferment effects
• assuming all loans behave alike

FAQs

Does this include income-driven repayment?

No. It uses a standard amortized repayment estimate.

Do extra payments help?

Yes, if they reduce principal and your loan allows them.

Can student loan rules vary?

Yes. Programs vary by lender, country, and loan type.

Is this financial advice?

No. It is a planning estimate only.