📈 Compound Interest Calculator
See how your money grows over time. Type exact values or use sliders. Model real portfolios up to $1M+.
$
$
%
yrs
Future Value
$343,778
Total Contributed
$130,000
Interest Earned
$213,778
Money Doubles In
2 years
Interest = % of Total
62.2%
Breakdown
Contributions Interest
📊 Growth Over Time
1
5
10
15
20
Contributions Interest
💡 How Compound Interest Works
Compound interest is when you earn interest on both your original investment AND the interest that has already been added. Over time, this creates a snowball effect — the longer you invest, the faster your money grows. This is why starting early, even with small amounts, can lead to significant wealth over time.
Read: How $200/month becomes $1M →