Simple Interest Calculator โ€” Calculate Interest on Loans & Investments

Calculate simple interest on loans, investments, and savings using the formula I = P ร— R ร— T. Get step-by-step calculations and understand how simple interest works.

Calculator

Simple Interest Formula

I = P ร— R ร— T

Where: I = Interest, P = Principal, R = Rate, T = Time

Calculation Results

๐Ÿ’ฐ

Enter the values above to calculate simple interest

๐Ÿ’ก Real-World Use Case

Scenario: You deposit โ‚น50,000 in a savings account that offers 4.5% simple interest per year. After 3 years, using this calculator, you'll earn โ‚น6,750 in interest (โ‚น50,000 ร— 4.5% ร— 3 years), bringing your total balance to โ‚น56,750. This helps you understand how much your money will grow with simple interest and plan your savings goals accordingly.

Frequently Asked Questions

What is simple interest?

Simple interest is a method of calculating interest where the interest is calculated only on the principal amount (initial investment or loan amount) for the entire period. It does not compound over time.

What is the simple interest formula?

The simple interest formula is I = P ร— R ร— T, where I is the interest, P is the principal amount, R is the annual interest rate (as a decimal), and T is the time period in years.

How is simple interest different from compound interest?

Simple interest is calculated only on the principal amount, while compound interest is calculated on both the principal and the accumulated interest from previous periods. Compound interest grows faster over time.

When is simple interest used?

Simple interest is commonly used for short-term loans, car loans, personal loans, and some savings accounts. It's also used in educational contexts to teach basic interest concepts.

How do I convert months or days to years for the calculation?

For months, divide by 12 (e.g., 6 months = 0.5 years). For days, divide by 365 (e.g., 90 days = 0.2466 years). The calculator automatically handles these conversions.

Can simple interest be negative?

No, simple interest cannot be negative if you use positive values for principal, rate, and time. However, the rate can be negative in some financial contexts, which would result in negative interest.