Simple Interest Calculator - Calculate Simple Interest Online
A Simple Interest Calculator is a basic financial tool for calculating interest earned or paid on a principal amount over a certain period. In simple interest, the interest is calculated only from the original principal and does not compound over time. This calculator is useful for short-term loans, basic savings scenarios, and educational purposes when learning the fundamentals of interest calculations.
Simple Interest Formula
B = P × r × tFormula: Final Value = P + BVariables:
- BInterest ValueInterest Value(e.g.: $500)
- PPrincipal - Initial amount of moneyPrincipal - Initial amount of money(e.g.: $10,000)
- rInterest Rate per period (%) - in decimalInterest Rate per period (%) - in decimal(e.g.: 0.05 (5% per year))
- tTime - in years or monthsTime - in years or months(e.g.: 2 years)
Categories:
How to Use the Simple Interest Calculator
- 1
Enter Principal
Enter the initial amount (principal) or loan value.
- 2
Enter Interest Rate
Enter the annual interest rate percentage (e.g., 5 for 5% per year).
- 3
Enter Time Period
Enter duration in years or months, matching the rate period.
- 4
View Results
See total interest and final amount (principal + interest).
Examples
Example 1: 2-Year Time Deposit
Deposit $50,000 at 6% simple interest for 2 years. Total interest and final value?
- 1.P=$50,000, r=0.06, t=2
- 2.Interest = 50000×0.06×2 = $6,000
- 3.Final = $56,000
You earn $6,000 interest over 2 years on a $50,000 deposit.
Example 2: Personal Loan
Borrow $20,000 at 12% for 3 years. Total repayment?
- 1.Interest = 20000×0.12×3 = $7,200
- 2.Total = $27,200
A $20,000 loan at 12% simple interest costs $27,200 over 3 years.
Example 3: Education Savings
Save $5,000/year at 4% simple interest for 5 years. Total?
- 1.Principal total = $25,000
- 2.Interest per year = $200
- 3.Total interest = $1,000
Five years of $5,000 deposits at 4% simple interest reach $26,000.
Example 4: Government Bond Coupons
Buy $100,000 bond, 7% annual coupon, 3-year tenor. Total coupons?
- 1.Interest = 100000×0.07×3 = $21,000
A $100,000 bond at 7% yields $21,000 in coupons over 3 years.