Loan Interest Calculator
Enter principal, rate, and period to calculate monthly payments and total interest. Compare equal payment and equal principal methods.
Equal Payment (Fixed Installment)
Pay the same total amount (principal + interest) each month.
Monthly Payment
Total Repayment
Total Interest
Equal Principal
Pay the same principal each month; interest decreases over time.
First Month
Last Month
Total Repayment
Total Interest
Method Comparison
| Equal Payment (Fixed Installment) | Equal Principal | |
|---|---|---|
| Monthly Payment | ||
| Total Repayment | ||
| Total Interest | ||
| Interest Difference | ||
Monthly Repayment Schedule
| # | Payment | Principal | Interest | Balance |
|---|
Repayment Method Guide
• Equal Payment (Fixed Installment) — Pay the same amount each month. Interest makes up a larger portion initially, with principal increasing over time.
• Equal Principal — Pay the same principal each month. Initial payments are higher, but total interest is less than equal payment.
• Actual loan terms may vary by financial institution. This calculator is for reference only.
• This tool runs entirely in your browser — no data is sent to the server.