Compound Interest Calculator
Calculate compound interest and final balance for any principal, rate, period and compounding frequency.
How to use this tool
- 1Enter your figures in the fields above.
- 2Results update instantly as you type.
- 3Adjust the inputs to compare different scenarios.
Frequently asked questions
What is the compound interest formula?+
A = P(1 + r/n)^(nt). A is the final amount, P the principal, r the annual rate, n the compounding periods per year, and t the number of years.
Is this calculator free?+
Yes. It's completely free, needs no sign-up, and runs entirely in your browser so your numbers stay private.
Guides & deep dives
The Power of Compound Interest: Formula, Rule of 72, and Examples
Master compound interest with the A=P(1+r/n)^nt formula, the Rule of 72, frequency comparisons, and start-early examples that show exactly how wealth grows.
How EMI Is Calculated: Formula, Example and Amortization Explained
Learn exactly how EMI is calculated using the standard formula, a step-by-step INR example, amortization table breakdown, and how tenure and prepayment affect your loan.
7 Proven Ways to Reduce Your Home Loan EMI
Cut your home loan EMI with balance transfers, prepayments, and rate negotiation. Practical strategies with worked examples for Indian borrowers.
SIP vs Lumpsum: Which Builds More Wealth?
SIP or lumpsum — which investment strategy builds more wealth? Real numbers, rupee cost averaging explained, and a clear comparison to help you decide.