Simple Interest Calculator

Use I = P × r × t to find interest and the final balance. Calculate it clearly with Figur.

How the simple interest calculator works

Use I = P × r × t to find interest and the final balance.

Method and assumptions

Figur applies straightforward arithmetic to the values you enter. The calculation runs locally in your browser and is not stored.

  • The result depends on accurate inputs and units.
  • External factors, fees, taxes, or rules not requested by the calculator are not included.
  • Use the result as a planning estimate and verify any high-stakes decision.

Sources and references

No external data source is required: this calculator uses standard arithmetic and the values you enter.

Worked example

$5,000 at 6% simple interest for 3 years.

Interest is $900 and the final amount is $5,900.

Frequently asked questions

Is interest compounded?

No. Simple interest is calculated only on the original principal.

How do I enter 6%?

Enter 6, not 0.06.

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