Compound interest calculator
Calculate the final amount of an investment with compound interest, including optional monthly contributions.
Final amount
1647.01
Total contributed: 1000
Interest earned: 647.01
This calculator is for informational and educational purposes only; it does not constitute financial advice or a guaranteed return projection.
Calculate how an investment grows over time with compound interest, including optional monthly contributions.
Applies the compound interest formula period by period, adding the interest earned and, if applicable, the periodic contribution at each step.
Use cases
- Estimating the long-term growth of a savings fund.
- Comparing different compounding frequencies.
- Simulating the effect of periodic contributions on an investment.
How it works
- 1
Enter the principal and rate
Type the initial principal and the annual interest rate.
- 2
Choose the term and frequency
Set the number of years and the compounding frequency (yearly, quarterly, monthly or daily).
- 3
Add contributions (optional)
Include a monthly contribution to simulate a periodic savings plan.
Frequently asked questions
- What is compounding frequency?
- It's how many times a year interest is calculated and added to the principal. Higher frequency produces slightly higher growth for the same annual rate.
- Does it account for inflation or taxes?
- No, the calculation is gross and does not account for inflation, fees or taxation, which vary by country and product.
Related tools
- Discount CalculatorCalculates the price after a discount.
- Margin CalculatorCalculates the profit margin.
- Markup CalculatorCalculates the markup over cost.
- Add Days to a DateAdds days to a date.
- Age CalculatorCalculates exact age in years, months and days.
- Average CalculatorCalculates the average of a list of numbers.