Compound-interest calculator
Project a balance using principal, rate, time, and compounding frequency.
Projected balance
Your inputs stay in this browser. This tool sends only an anonymous use total after a successful result.
How to use the compound-interest calculator
Enter the requested values, review the units and assumptions, then calculate the result. The tool validates practical limits before running.
Frequently asked questions
What assumptions does the compound-interest result use?
It assumes a fixed rate, regular compounding, no additional deposits, and no taxes or fees.