“Compound interest is the eighth wonder of the world.” – Einstein

Your Details

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⚙️ Advanced: Inflation & Tax

📊 Rule of 72 / 114

At 7.0% :
Double in 10.3 yrs
Triple in 16.3 yrs

📋 History

Final balance after 30 years
$487,233
Total contributed: $190,000
Contributions
$190k
Interest earned
$297k
📈 Balance growth
📊 Annual breakdown

⚖️ Comparison

What is compound interest? Interest earned on both your initial principal and the accumulated interest from previous periods.
Why start early? Time is the most powerful factor. Even small monthly contributions grow significantly over decades.
How to use this calculator? Adjust the sliders to see how rate, time, and contributions affect your final balance. Try the goal seek modes!
🔒 All calculations are performed locally in your browser. No data is ever sent to a server. This tool is for educational purposes only.
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