Compound Interest Calculator
Calculate compound interest and final amount for any investment.
Parameters & Inputs
Calculated Breakdown
No calculation yet
Set your values on the left and click Calculate to view instantaneous results.
About Compound Interest Calculator
Compound Interest Calculator shows how a principal grows when interest is reinvested, with a choice of compounding frequency: yearly, half-yearly, quarterly or monthly.
More frequent compounding raises the effective annual rate even when the nominal rate stays the same.
How to use Compound Interest Calculator
- 1
Enter principal and rate
The starting amount and the nominal annual interest rate.
- 2
Choose frequency and term
Compounding frequency and the number of years.
- 3
Compare results
Total amount, interest earned and the effective annual yield are shown.
Questions about Compound Interest Calculator
What is the formula?
A = P(1 + r/n)^(nt), where n is compounds per year and t is years.
How much does frequency matter?
At 12% nominal, yearly compounding yields 12.00% effective, monthly yields 12.68%.
Can I add monthly contributions?
This calculator handles a single principal. For recurring deposits use the SIP calculator.
What is the difference between nominal and effective rate?
Nominal ignores compounding within the year; effective includes it and is the number to compare across products.
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Last updated November 2026. Files are processed on FilePlume's own hardware and deleted within 60 minutes; nothing is used for training.