How to use the Compound Interest Calculator
Estimate how an initial principal grows when interest is added to the balance at regular intervals. Enter the requested values, review their units, and select Calculate. The result panel shows both the answer and the substituted steps.
The formula
A = P(1 + r/n)^(nt)
Frequently asked questions
What does compounding frequency change?
More frequent compounding credits interest sooner, allowing that interest to earn additional interest.
Does this include regular contributions?
This launch calculator models one initial principal only; add recurring deposits with a savings calculator.
Important notes
Results are estimates based on the values supplied and the formula shown. Round only at the end of a calculation, and verify safety-critical, medical, financial, or construction decisions with an appropriate professional.