EEasynivo
Free online tool

Compound Interest Calculator

Project investment growth with recurring contributions and flexible compounding.

Enter your values

%

Final balance

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Enter the values and choose Calculate.

Final balance—
Total contributed—
Interest earned—

How to use this tool

Estimate how an initial balance and monthly contributions can grow over time.

  1. Enter your values
  2. Calculate
  3. Copy · Share

Formula and method

Monthly equivalent rate = (1 + annual rate ÷ compounds per year)^(compounds per year ÷ 12) − 1

Worked example

10,000 at 5% for 10 years with 100 added monthly grows from both contributions and compound interest.

Frequently asked questions

Is this tool free and private?

Yes. It is free to use without an account, and the calculation runs in your browser.

Compound Interest Calculator

Project investment growth with recurring contributions and flexible compounding.

Transparency

Sources & methodology

Calculation method
Monthly equivalent rate = (1 + annual rate ÷ compounds per year)^(compounds per year ÷ 12) − 1
Evidence basis
Transparent arithmetic using values entered by the user.
Applies to
No statutory reference year. Results use the values and assumptions entered now.
Last reviewed
Limitations
The result excludes fees, taxes, changing rates and contract-specific rules unless entered explicitly.

Sources

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Content basis and verification

· Calculations run in your browser. Check the formula and assumptions on this page, and confirm important financial, tax, medical or legal decisions against current official guidance.