Math
Investment Calculator
Enter initial amount, monthly deposit, annual rate and term. Year-by-year growth table.
Esc Clear
Final amount
Total contributed
Interest gains
Total contributed (%)
Interest gains (%)
| Year | Balance | Interest gains |
|---|---|---|
Enter investment details to calculate
What does Investment Calculator?
A compound interest and investment return calculator — with optional monthly contributions.
How to use Investment Calculator?
- Enter the initial amount, annual interest rate, and period.
- Add a monthly contribution (optional).
- See investment growth and an accumulation chart.
Key features
- Compound interest calculation with monthly contributions
- Investment growth chart over time
- Principal vs interest breakdown
Frequently asked questions
What is compound interest?
Interest calculated on both the principal and the accumulated interest — causing exponential growth over time.
Does the calculation account for inflation?
No. The tool calculates nominal values — for real returns, subtract the inflation rate from the interest rate.
Is this tool free?
Yes, this tool is completely free and requires no registration.
Is my data saved?
No. All calculations happen in your browser only — no data is sent to any server.