Solve for principal, interest rate, time, interest earned, or total amount using simple interest. Unlike compound growth, the calculation applies interest only to the original principal throughout the selected period.
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Review the inputs, outputs, calculation method, and formulas used by this tool.
Simple interest does not compound; interest is proportional to principal, annual rate, and time.
I = P × R × T
A = P + I = P(1 + R × T)
Symbols refer to the corresponding input and result labels shown above.
Enter your figures, choose any available options, and select Calculate. You can change the inputs as often as you like to compare scenarios.
Results are estimates for education and planning. Taxes, lender rules, fees, and investment returns can vary, so verify important decisions with a qualified professional.