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Finance

Simple interest calculator

Compute simple interest and final amount (A = P·(1 + r·t)).

Enter Principal, Annual interest rate (%), and Years to calculate Interest and Final amount. Results update instantly as you type. Try an example preset to sanity-check the tool.

Inputs

Examples
About this tool
  • Inputs: Principal, Annual interest rate (%), Years
  • Outputs: Interest, Final amount
Formulas
Interest
Interest = Principal × Annual interest rate (%) / 100 × Years
Final amount
Final amount = Principal + Principal × Annual interest rate (%) / 100 × Years
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