Compound Interest Calculator
Estimate how your investment grows over time with compound interest, including optional annual contributions.
Calculator
Enter your numbers below to see the result instantly.
Formula
A = P × (1 + r)^t
Contributions are added annually and compounded forward.
How to use
Enter your starting amount, interest rate, time horizon, and optional yearly contributions.
What is Compound Interest Calculator?
A compound interest calculator shows how your investment grows over time when interest is reinvested. It is essential for understanding long-term investing, savings, and exponential growth.
Why this matters
Understanding your financial results helps you make better decisions, compare different scenarios, and plan for the future with more confidence.
FAQ
What does compound interest mean?
Compound interest means you earn interest on both your original amount and the interest already added over time.
Why use a compound interest calculator?
It helps you estimate long-term investment growth and understand how contributions and reinvested returns affect the final outcome.