Calculate simple interest and total amount from principal, annual rate, and time. Choose currency for clear display.
Simple Interest Calculator
Results use the currency you select (display only — amounts are not converted).
How to Use
- Select currency.
- Enter principal, rate (% per year), and time in years.
- Calculate interest and total.
Formula
I = P × R × T / 100. Total = P + I.
Worked Example
Example: $10,000 at 5% for 3 years → interest $1,500, total $11,500.
What the Result Means
Simple interest does not compound. Many real products use compound interest instead.
Important Notes & Limitations
- Not for compound or amortizing loans.
Frequently Asked Questions
When is simple interest used?
Some short-term loans or teaching examples.
Is time in years only?
Enter fractional years (e.g., 0.5 for 6 months) if needed.
Difference vs compound?
Compound adds interest on interest; use the Compound Interest Calculator for that.
Currency?
Labels only—math is the same.
Related Calculators
See also: Loan EMI, Mortgage, Compound Interest, Percentage.
Disclaimer: Results are approximate and for educational and informational purposes only. They are not financial, tax, medical, or legal advice. Verify important decisions with a qualified professional.