In-browser tool
Compound Interest Calculator
See how savings grow with compound interest from a starting amount, annual rate, number of years and compounding frequency.
%
Final balance1,647.01
Interest earned647.01
Calculated in your browser — nothing is uploaded.
How it works
01
Enter the numbers
02
See the result update live
03
Copy or reuse it
Frequently asked questions
What is compound interest?
Interest that is added to the balance so it earns interest too. More frequent compounding (monthly vs yearly) grows the balance faster. This calculator uses your starting amount only, with no regular contributions.
Is my file uploaded to a server?
No. This tool runs entirely in your browser. You can open your browser's network tab and verify no request carries your file.