Compound Interest Calculator
Grow a deposit with compound interest — yearly, half-yearly, quarterly or monthly.
Result
How to use
- 1
Enter the principal, interest rate and time.
- 2
Choose how often interest is compounded.
- 3
See the final amount and the interest earned.
Questions
What is compound interest?
Interest earned on both your original money and the interest already added. A = P × (1 + r/n)^(n×t).
Does compounding frequency matter?
Yes — more frequent compounding gives slightly more interest for the same rate.
About this Compound Interest tool
Compound Interest Calculator — Grow a deposit with compound interest — yearly, half-yearly, quarterly or monthly. It is one of 200 free tools on namasivayam.in, made by software engineer Namasivayam Vadivelan for everyday use in India.
Everything is calculated instantly in your browser: nothing you type or upload is sent to any server, there is no sign-up, and it works on mobile and desktop. Enter the principal, interest rate and time.
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Results are estimates to help you plan. They are not financial, tax or medical advice.