Compound Interest Calculator
Calculate compound growth and periodic balances from an initial investment and recurring contributions.
Calculated in this browserNo external transferInputs are not saved automatically
Calculation result
Based on end-of-month contributions, monthly compounding, excluding tax and fees.
Final amount-
- Total contributed
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- Interest earned
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- Cumulative return
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- Investment period
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- Average monthly growth
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- Average monthly interest
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- Inflation-adjusted amount
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Results are examples based on inputs and do not guarantee actual returns.
Asset growth
Growth from year zero to the final period, generated from the annual table.
โ Initial principalโฐ Cumulative contributionsโ Interestโ Total assets
Annual breakdown
| Year | Opening balance | Added | Interest | Closing balance | Cumulative contribution | Cumulative interest |
|---|
Scenario
Formula and assumptions
Future value with end-period contributions: FV = P ร (1 + r)n + PMT ร ((1 + r)n โ 1) / r
- P
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- PMT
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- r
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- n
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- Contribution timing
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Internal calculations do not round intermediate values; rounding is applied only for display.
Results are examples based on inputs and do not guarantee actual returns.