📈 Compound Interest Calculator
See how a starting balance and regular deposits can grow with interest compounded monthly.
Estimates only. Results are general calculations, not financial advice. Real offers may include fees, taxes, insurance and different rounding. Check with your lender or a qualified adviser.
How to use the Compound Interest Calculator
- Enter your starting amount and monthly deposit.
- Enter the annual rate and number of years.
- Read the future value, total deposits and interest earned.
Examples
- $1,000 at 5% for 10 years with no deposits grows to about $1,647.01.
Formula and method
Future value = P × (1 + r)^n + C × ((1 + r)^n − 1) ÷ r, with r = annual rate ÷ 12, n = years × 12, deposits made at the end of each month. Returns are not guaranteed, and fees, taxes and inflation are ignored.
Frequently asked questions
Is interest compounded monthly?
Yes, monthly.
Are returns guaranteed?
No. Real investments vary.
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