Calculate simple interest earned on a principal amount.
The Simple Interest Calculator is completely free and requires no sign-up. Enter your values and click Calculate — the result appears instantly. All calculations run locally in your browser.
Calculate your monthly mortgage payment, total interest and full amortization schedule.
→Calculate monthly payments and total repayment for any personal loan.
→Calculate car loan payments, interest and amortization for your vehicle.
→Calculate simple and compound interest on any principal amount.
→See how your money grows with compound interest over time.
→Project the future value of your investments with regular contributions.
→