Discover the power of compounding! Calculate how your money grows over time with regular investments and compounding interest.
What is initial investment? ⓘ
What are monthly contributions? ⓘ
What is interest rate? ⓘ
What is investment period? ⓘ
What is compounding frequency? ⓘ
What is tax rate? ⓘ
See how small differences in interest rates or time can dramatically affect your final amount:
Example: $10,000 at 7% for 30 years = $76,123
Same investment at 8% = $100,627 (+32%)
Same investment for 40 years = $149,745 (+97%)
Quick way to estimate doubling time:
Years to double = 72 ÷ Interest Rate
At 7%: Doubles every ~10.3 years
At 10%: Doubles every ~7.2 years
At 12%: Doubles every ~6 years
See your investment growth with interactive charts and graphs for better understanding.
Get year-by-year breakdowns and understand how each factor affects your returns.
Compare different investment strategies and see which works best for your goals.
Includes tax, inflation, and contribution increases for realistic projections.
Use on any device - perfect for quick calculations on the go.
Your data never leaves your browser - all calculations happen locally.