Investment Calculator
Compound interest, ROI, and investment growth calculations.
Investment Calculator
Calculation History
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Compound Interest
- • Future value calculation
- • Multiple compound frequencies
- • Total interest earned
- • ROI percentage
Investment Planning
- • Compare investment options
- • Plan for financial goals
- • Understand compound growth
- • Calculate returns
Privacy & Features
- • 100% client-side calculations
- • No data sent to servers
- • Calculation history
- • Works offline
About the Investment Calculator
The Investment Calculator projects how money grows over time with compound interest, showing future value, total contributions, and interest earned. It turns a savings or investment plan into concrete numbers you can plan around.
Understanding compound growth is the key to long-term planning — for retirement, a goal, or simply seeing what regular contributions become. Visualizing the future value motivates saving and helps you compare different rates and timeframes.
All calculations run in your browser with nothing uploaded and no account, so your financial figures stay private while you model scenarios.
How to use the Investment Calculator
- Enter your initial investment (principal).
- Add any regular contribution amount and frequency.
- Enter the expected annual return rate.
- Set the time period.
- Calculate to see the projected future value and interest earned.
Common use cases
- Projecting retirement or long-term savings growth.
- Seeing how regular contributions compound over time.
- Comparing outcomes at different return rates.
- Setting a savings target for a financial goal.
Frequently asked questions
What is compound interest?
It’s interest earned on both your original principal and the interest already accumulated, which causes growth to accelerate over time — the engine behind long-term investing.
Can I include regular contributions?
Yes. Adding a recurring contribution shows how steady investing builds value far beyond a one-time deposit.
Are the projections guaranteed?
No. Projections assume a constant return rate you provide; real markets fluctuate, so treat results as estimates for planning, not promises.
Is my financial data uploaded?
No. Calculations run in your browser, so your figures never leave your device.
How is this different from the Loan Calculator?
This models money that grows through returns; the Loan Calculator models debt you repay with interest.