Personal Loan Calculator

What is a Personal Loan Calculator?

A personal loan calculator helps you estimate the monthly payments, total interest, and overall cost of an unsecured personal loan. By entering your loan amount, interest rate, and term, you can quickly compare scenarios and make informed borrowing decisions — whether you're consolidating debt, financing a home improvement, or covering unexpected expenses.

How Personal Loan Payments Are Calculated

Personal loans typically use a fixed-rate amortization formula to determine equal monthly payments:

Where M is the monthly payment, P is the loan principal, r is the monthly interest rate (annual rate divided by 12), and n is the total number of monthly payments. In the early months, most of each payment covers interest. Over time, a larger share goes toward the principal.

Average Personal Loan Interest Rates by Credit Score

Your credit score is the biggest factor determining your interest rate:

• Excellent (720+): 6% – 8% APR
• Good (680–719): 9% – 12% APR
• Fair (640–679): 13% – 17% APR
• Poor (below 640): 18% – 36% APR

The national average for personal loans is approximately 12% APR. Shopping around and comparing offers from multiple lenders can save thousands.

Personal Loan vs. Credit Card: When to Choose Each

Personal loans are better for large, one-time expenses because they offer lower fixed rates (typically 6–18%) compared to credit cards (15–25%+). The fixed repayment schedule also helps you pay off the debt in a defined timeline.

Credit cards are better for smaller, recurring expenses you can pay off monthly. If you pay your balance in full each month, you pay no interest at all.

How Extra Payments Save Money

Every extra dollar you pay beyond the minimum goes directly to reducing your principal balance. This has a compounding effect: a lower balance means less interest accrues each month, which means even more of your next payment goes to principal. Even an extra $50–$100/month can save hundreds in interest and shorten your loan by months.

Tips for Getting the Best Personal Loan

• Check your credit score first — know where you stand before applying.
• Get pre-qualified — most lenders offer soft-pull pre-qualification that won't affect your score.
• Compare at least 3–5 lenders — rates vary significantly between banks, credit unions, and online lenders.
• Watch for fees — origination fees (1–8%), late fees, and prepayment penalties can add up.
• Choose the shortest term you can afford — shorter terms mean less total interest, even if monthly payments are higher.
• Avoid borrowing more than you need — it's tempting to borrow extra, but you'll pay interest on every dollar.

Frequently Asked Questions

How is a personal loan monthly payment calculated?

Personal loan payments use the amortization formula: M = P × r(1+r)^n / [(1+r)^n - 1], where M is monthly payment, P is loan principal, r is monthly interest rate (annual rate / 12), and n is total number of payments. This ensures equal payments throughout the loan.

What is a good interest rate for a personal loan?

A good personal loan interest rate depends on your credit score. Excellent credit (720+) typically qualifies for 6–8%, good credit (680–719) for 9–12%, fair credit (640–679) for 13–17%, and poor credit (below 640) for 18–36%. The national average is around 12%.

Should I choose a shorter or longer loan term?

A shorter loan term means higher monthly payments but less total interest paid. A longer term lowers your monthly payment but costs more overall. For example, a $15,000 loan at 10% costs $2,375 in interest over 3 years, but $4,497 over 5 years — nearly double.

How do extra payments help reduce loan costs?

Extra payments go directly toward your principal balance, reducing the amount that accrues interest. Even small extra payments of $50–100 per month can save hundreds or thousands in interest and shorten your loan by several months.

What is the difference between interest rate and APR for personal loans?

The interest rate is the cost of borrowing the principal. APR (Annual Percentage Rate) includes the interest rate plus any fees (like origination fees). For personal loans without fees, APR equals the interest rate. Always compare APR to get the true cost.