Compound Interest
Interest compounded over a number of periods.
Ctrl+Enter runs. Ctrl+Shift+Backspace clears.
Export and import are available after you sign in. Sign in
Uses the standard compound formula and returns the interest earned.
About this tool
See how much a deposit or investment earns when interest is added to the balance and earns interest itself. Enter the principal, annual rate, number of years and how many times per year interest is compounded.
How to use it
- 01
Enter the principal and the annual rate in percent.
- 02
Enter the number of years.
- 03
Set the compounding periods per year, for example 12 for monthly.
Frequently asked questions
Which formula is used?
The standard formula A = P(1 + r/n)^(nt); the tool shows the interest earned, A − P.
Does monthly compounding earn more?
Yes, slightly. More frequent compounding gives a higher result at the same annual rate.