CalculateMeasure

Finance

Compound Interest Calculator

Calculate future value and interest earned from principal, annual rate, years, and compounding frequency.

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How to use this calculator

Enter the requested values and select Calculate. The result is computed locally in your browser using the formula shown on this page.

Understanding the result

This calculator reports the mathematical result without assigning unsupported ratings or professional judgments. Context may affect how the result should be interpreted.

Calculation method

Future Value = Principal × (1 + annual rate ÷ compounds per year)^(compounds per year × years).

Calculator guide

About the Compound Interest Calculator

Compound interest adds earned interest back to the balance so later interest can accrue on both principal and prior interest.

What to keep in mind

  • Compounding frequency affects future value.
  • The calculator assumes a constant rate unless otherwise stated.
  • Taxes, fees, withdrawals, and additional contributions can change real-world results.

Formula & methodology

Future Value = Principal × (1 + annual rate ÷ compounds per year)^(compounds per year × years)

Review standard: Level B · Industry formula. How calculator reviews work.

CalculateMeasure performs the arithmetic locally in your browser. The displayed result depends on the values and units you enter.

Frequently asked questions

What does this calculator calculate?

Compound interest adds earned interest back to the balance so later interest can accrue on both principal and prior interest.

Can I use the result for an important decision?

Use the result as a calculation aid and verify the inputs, assumptions, and applicable professional or regulatory requirements before relying on it for an important decision.

Does CalculateMeasure store the values I enter?

This calculator performs its arithmetic in your browser. The calculator itself does not need to send your entered values to a server to produce the result.