Retirement & Investing / FREE TOOL
Simple Interest Investment Calculator
Calculate simple interest on a principal.
Educational estimate · No account required
Enter your numbers
Change the example values to match your scenario.
Estimate only. Review the formula notes and verify inputs before making financial, tax, legal or business decisions.
How the estimate works
Calculates simple interest without compounding.
Assumptions and limitations
This tool uses only the values you enter and a simplified calculation model. It does not automatically retrieve your bank, tax, utility, property, ad-platform or vendor data. Rates, eligibility, fees, laws and pricing can change.
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