Student Loan Interest Calculator — Calculate Your Student Loan Costs

Student Loan Interest Calculator

Calculate total interest paid, monthly payments, and repayment timeline for your student loans. Understand how interest affects your total repayment amount.

Step 1: Loan Details

$30,000
5.5%
10 years

Understanding Student Loan Interest

Interest rates vary by loan type. Federal loans typically have fixed rates, while private loans may have variable rates. Interest compounds daily on most student loans.

Step 2: Repayment Options

About Repayment Plans

Standard plans have fixed payments over 10 years. Income-driven plans adjust payments based on your income but may extend the repayment period and increase total interest paid.

Student Loan Calculation Results

Summary
Plan Comparison
Breakdown

Monthly Payment

$325
Based on $30,000 at 5.5% for 10 years
Total Interest Paid
$9,000
Total Amount Paid
$39,000
Payoff Date
Jun 2034
Interest Percentage
23%

Repayment Plan Comparison

Repayment Plan Monthly Payment Total Interest Total Amount

Annual Payment Breakdown

Student Loan Formula

Monthly Payment = [P × r × (1+r)^n] ÷ [(1+r)^n – 1]

Where P = principal amount, r = monthly interest rate (annual rate ÷ 12), n = total number of payments (years × 12). This is the standard amortization formula.

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