Compound Growth Calculator
How much will my
monthly savings grow to?
Enter your initial amount, monthly contribution, expected annual return, and time horizon to see your projected final balance.
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Compound Interest Ledger
Results update instantly as you type
Final Balance
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Total Contributed
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How is this calculated?
Your initial amount is invested as a lump sum, and your monthly contribution is added each month, all compounding monthly at the entered annual rate.
A note of caution
Actual investment returns vary year to year and can include losses. This is a reference estimate based on a constant average return assumption, not investment advice.
Frequently Asked Questions
How accurate is this result?
This assumes a constant rate of return, which real markets rarely provide. Use it to compare scenarios, not to predict exact outcomes.
Is my data stored or sent anywhere?
No. All calculations happen entirely in your browser.
Does this work on mobile?
Yes, the layout automatically adapts to your screen size.