Compound Interest Calculator
Watch Your Money Grow Like Magic 🚀 | Free & Accurate Investment Calculator
What is the Compound Interest Calculator?
The Compound Interest Calculator is a free financial planning tool that shows how your investments grow over time when interest compounds—earning "interest on interest." Whether building an emergency fund, planning retirement, or comparing savings accounts, this calculator provides accurate projections in seconds.
Compound Interest Formula
- A = Future Value (total amount)
- P = Principal (initial deposit)
- r = Annual interest rate (as decimal)
- n = Compounding frequency per year
- t = Time in years
Frequently Asked Questions
What's the difference between simple and compound interest?
Simple interest is calculated only on the principal. Compound interest is calculated on principal + accumulated interest, leading to exponential growth.
How often should I compound interest for maximum returns?
Daily compounding yields the highest returns, followed by monthly, then annually. Many high-yield savings accounts compound daily.
Can I use this for stocks or mutual funds?
Yes. Enter your expected annual return rate (e.g., 10-12% for stocks) to estimate portfolio growth for SIP or lump sum investments.
Is this calculator accurate for international currencies?
Yes. It supports USD, EUR, INR, GBP, JPY, and CNY with proper currency formatting.