Finance
Compound Interest Calculator
See how much your money grows with compound interest.
Compound Interest Calculator
Future value
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Interest earned—
Total growth—
How compound interest works
Compound interest earns interest on top of interest. The formula is A = P × (1 + r ÷ n)^(n × t), where P is principal, r the annual rate, n compounding periods per year and t the number of years.
The more often interest compounds, the faster your money grows.
Frequently asked questions
What is compound interest?
It's interest calculated on both your original principal and the interest already earned, so your balance grows exponentially over time.
How often does interest compound?
It depends on the account — daily, monthly, quarterly or yearly. This calculator lets you choose.
Does this include regular contributions?
No — it shows growth of a single lump sum. Adding money regularly would grow it further.