Compound Interest Calculator
Compound Interest & Savings A = P(1+r/n)^(nt)
Choose a single deposit with interest compounded into the principal, or add a fixed amount every month. The yearly table separates principal deposited, interest earned and the ending balance.
The calculator above computes compound interest, where the interest of each period is added to the principal and earns interest in the next period.
Formulas used
A = P(1 + r)ⁿ
A = P(1 + r/m)^(m·t)
- m is the number of compounding periods per year and t the number of years.
- The interest earned is A − P.
Worked example
Deposit 10,000 at 6% per year compounded yearly for 3 years:
A = 10,000 · 1.06³ ≈ 11,910.16
Enter the same values in the calculator above to see every step of the solution.
How to use the calculator
- Enter the principal, the rate per period, and the number of compounding periods.
- Press the calculate button. The result appears instantly.
- Read the step-by-step solution, rendered with KaTeX, to check your own work.