Financial Calculators

Simple Interest Calculator

Calculate simple interest from principal, annual rate, and time.

Inputs

Enter your values to get an instant result.

Result

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What does this calculator do?

Calculate simple interest from principal, annual rate, and time.

Formula

Simple interest = principal × rate × time.

Example calculation

A $5,000 principal at 6% for 3 years earns $900 simple interest.

Common use cases

  • Basic lending
  • Savings estimates
  • Classroom examples

Limitations and accuracy notes

This calculator is for quick planning and education. Results depend on your inputs and may not include every real-world rule, fee, tax, health factor, or local requirement.

Simple Interest Calculator FAQ

Is this calculator free?

Yes. It gives quick estimates directly in your browser.

Should I use this as professional advice?

No. Use it as a planning aid and confirm important decisions with a qualified professional.