Finance
Compound interest
Grow a starting balance with monthly contributions.
Your numbers
Both a decimal point and a comma work.
Result
236,126.99
Final amount
- Your contributions
- 220,000
- Interest
- 16,126.99
How it works
r = i / 12 / 100; R = S(1 + r)ⁿ + P((1 + r)ⁿ − 1) / r
Using the calculator
Enter: Starting amount · Monthly contribution · Annual rate · Term in months. Calculation: r = i / 12 / 100; R = S(1 + r)ⁿ + P((1 + r)ⁿ − 1) / r.
Worked input and result
Example: Starting amount = 1,000; Monthly contribution = 100; Annual rate = 6 %; Term in months = 24. Result: Final amount = 3,670.36 (Your contributions: 3,400; Interest: 270.36).
Understanding the result
Monthly compounding at a fixed annual rate, with contributions at month-end. Taxes, fees and inflation are excluded.
The projected balance assumes a constant annual rate with monthly compounding and end-of-month contributions. Actual deposit terms and investment returns may differ.