Compound Interest Calculator
Project compound growth with regular contributions.
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Formula / Calculation Method
FV = P(1+r)^n + C((1+r)^n − 1)/r.
Example Calculation
1,000 at 10% compounded annually for two years becomes 1,210 without contributions.
Understanding the Result
Contributions occur at the end of each compounding period. Rates remain constant; inflation, fees and taxes are excluded.
What is the Compound Interest Calculator?
Project compound growth with regular contributions.
How to Use
Enter the initial amount, annual nominal interest rate, duration and compounding frequency. Set the contribution to the amount added at the end of each compounding period.
Select Calculate after entering your values. Text tools update as you type. Reset restores the starting fields.
Interpreting the Calculation
Increasing frequency changes both interest accrual and contribution count. If you switch from annual to monthly periods, change the contribution amount too to keep the same yearly savings budget.
Common Questions
When are recurring contributions added?
At the end of each compounding period, after that period’s interest is calculated.
What assumptions does this tool use?
Contributions occur at the end of each compounding period. Rates remain constant; inflation, fees and taxes are excluded.
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