Student Loan Refinance Calculator
Compare monthly payment and interest before and after refinancing a student loan at a lower rate.
What this calculator does
The Student Loan Refinance Calculator estimates your result instantly from the values you enter, using standard student loans formulas. Compare monthly payment and interest before and after refinancing a student loan at a lower rate. Calculations run in your browser, so nothing you type is sent to a server, and the output is an estimate for planning rather than financial advice.
Result
About Student Loan Refinance Calculator
When you are considering refinancing a student loan, the key question is whether a lower rate is worth the move. This tool compares the monthly payment you make now with the payment you would make at a new rate over the same term, and shows how much you would save across the whole loan.
It is aimed at borrowers weighing a refinance offer. Because it prices both the current and new terms side by side on the same balance and term, it isolates the effect of the rate change without you doing two separate amortizations by hand.
Formula & Mathematical Calculation
Current Monthly = f(Loan Balance ($), Current Rate (%), New Rate (%), Term (years))
Calculated according to standard finance formulas implemented in the calculator core.
Calculation Example
On a $35000 balance over 10 years, the payment at 7% is $406.38 and the payment at 4.5% is $362.73. The difference is $43.65 a month, and over 120 months that totals about $5237.43 in savings. The tool reports all three figures with the interpretation line.
Key Benefits
- Prices the current and new rates on the same balance and term so only the rate differs.
- Shows the per-month saving and the total saving across the whole term.
- Handles a zero rate on either side by falling back to straight division.
- Keeps the term in months consistent for both payments so the comparison is fair.
- Summarizes the result in one sentence naming the monthly and total savings.
How to Use this Calculator
-
Enter the balance
Type the loan balance you would refinance in the balance field, for example 35000. -
Set the current rate
Enter your current annual rate in the current rate field, such as 7. -
Set the new rate
Enter the offered new annual rate in the new rate field, for example 4.5. -
Set the term
Enter the remaining term in years; the tool multiplies it by 12 for months. A value of 0 triggers the term error. -
Compare the three outputs
Old payment, new payment, and total saving show the monthly difference and what it adds up to over the term.
Assumptions & Limitations
What the calculation assumes
- Every value you enter is treated as an exact, known amount.
- Rates and contributions are assumed to stay constant for the whole period unless the form asks for them separately.
- Results use standard financial formulas and ignore fees, penalties and promotional terms that are not entered above.
- Inflation, tax changes and market volatility are not modelled unless a field for them is provided.
- Amounts are unit-agnostic: results are returned in the same currency you enter.
What it does not cover
- Student Loan Refinance Calculator produces estimates for education and planning, not a quote, offer or professional advice.
- Real-world outcomes differ when fees, taxes, rounding rules or provider-specific terms apply.
- Local regulations and tax rules vary by country and change over time; verify current rules for your jurisdiction.
- Figures are only as accurate as the inputs you supply — check them before acting on the result.
- For decisions with lasting financial impact, confirm the numbers with a qualified professional.
Frequently Asked Questions
Free to use, no account needed. Calculations run in your browser, so nothing you type is sent to a server. Results are estimates — how we build and check our calculators.