Compound Interest Calculator
Calculate the maturity amount and interest earned with compounding.
Your file never leaves this browser tab — everything runs locally on your device.
How to use compound interest calculator
- Enter the principal amount you're investing or depositing.
- Enter the annual interest rate and the time period in years.
- Choose how often interest compounds — annually, semi-annually, quarterly or monthly.
- Read the maturity amount and total interest earned.
Common use cases
- Projecting how a fixed deposit or savings account will grow over time.
- Comparing how different compounding frequencies affect returns.
- Estimating investment growth for financial planning.
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