What is a Compound Interest Calculator?
A Compound Interest Calculator works out how a sum grows when interest is added to the balance and then earns interest itself. It shows the total interest and the final amount.
The more often interest is compounded, the faster the balance grows. Bank deposits in India usually compound quarterly, while many loans compound monthly. The calculator lets you choose the frequency.
How to use the Compound Interest Calculator
- Enter principal amount.
- Enter interest rate.
- Enter time period.
- Select compounding frequency.
- Tap Calculate to see the result.
- Tap Reset to clear the fields and try again.
Who should use it
- Savers comparing deposits with different compounding
- Students learning how compounding works
- Anyone estimating long-term growth
Key terms
- Principal
- The starting amount.
- Compounding frequency
- How often interest is added to the balance.
- Total amount
- Principal plus all interest earned.
Frequently asked questions
What is the difference between simple and compound interest?
Simple interest is earned only on the principal; compound interest is also earned on past interest.
Does more frequent compounding help?
Yes. Monthly compounding gives slightly more than yearly at the same rate.
Which frequency do Indian banks use for FDs?
Usually quarterly. Check your bank’s terms.
Is the interest taxable?
Interest from deposits is generally taxable at your slab rate.
Is my data stored?
No. Everything you enter stays in your browser and is cleared when you close the page.
Last updated: 1 November 2026