Personal Finance
Interest Calculator
Simple interest amount and total repayment.
Free to use — no sign-up or login.
Interest
Total
Amortization schedule
| # | Date | Payment | Principal | Extra | Interest | Balance |
|---|---|---|---|---|---|---|
This free Interest Calculator covers Simple interest amount and total repayment.
This calculator uses the simple-interest formula I = P r t. Related personal finance tools sit beside How it works, with no account required.
Using the Interest Calculator
Simple interest amount and total repayment. Typical inputs are Principal ($), Annual rate (%) and Years. How it works beside the form states the identity the Interest Calculator applies.
FAQ
How do I use the Interest Calculator?
Open the Interest Calculator, fill Principal ($), Annual rate (%) and Years, and read the result. Multiply principal, rate, and years.
What formula does the Interest Calculator use?
The Interest Calculator uses the identity in How it works. In words: Multiply principal, rate, and years.
Assumptions and limitations
Personal finance figures are illustrative. Taxes, insurance, fees, and lender overlays are omitted unless a field names them. This is not financial advice.