Compound Interest Calculator

Calculate the future value of an investment with compound interest. Supports periodic contributions, selectable compounding frequency and clear breakdowns.

Inputs

Initial Principal

Annual Interest Rate (%)

Years

Compounds per year

Periodic contribution (optional)

Contribution frequency

Preview

Enter your inputs and press Calculate to see the final value, total contributions and interest earned.

Rate: 5%

Period: 10 years

Features

Accurate Calculations

All calculations are performed locally using standard financial formulas.

Periodic Contributions

Support for recurring contributions with configurable frequency.

Private & Local

All computation is executed in your browser; no data leaves your device.

Fast

Instant results without server requests.

How it works

Enter inputs

Provide the initial principal, rate, period and optional contributions.

Choose frequencies

Select how often interest compounds and how often you contribute.

Calculate

Click Calculate to run the formula and display the future value and interest earned.