Advanced Compound Interest Calculator
Compare 2 scenarios, adjust for inflation, and estimate doubling time with Rule of 72. Export your full analysis.
⚖️ Compare 2 Scenarios
📉 Inflation Adjusted
🧮 Rule of 72
📄 Export PDF & TXT
💱 18+ Currencies
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Scenario 1
Scenario 2
Scenario 1
Final Amount
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Inflation-Adjusted
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Total Interest
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Scenario 2
Final Amount
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Inflation-Adjusted
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Total Interest
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Rule of 72 Estimates
Scenario 1 Doubling Time
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Scenario 2 Doubling Time
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Inflation Impact
At 3% annual inflation, today’s $1 will be worth — in 20 years.
| Year | Scenario 1 | Scenario 2 |
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Frequently Asked Questions
What is the Rule of 72?
It estimates how long it takes for an investment to double: 72 ÷ annual return (%) = years to double.
Why show inflation-adjusted value?
Nominal returns look great, but inflation erodes purchasing power. Real returns show actual growth in today’s dollars.
How is compounding calculated with monthly contributions?
Each month, your contribution is added, then interest is applied based on your compounding frequency.
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