About this compound interest calculator
Estimate how an initial balance grows with recurring contributions and compound interest.
How to use it
Enter the values requested by the calculator. Results update in your browser as you change the inputs. Review the assumptions shown on the calculator before using the result.
Formula
A = P(1+r/n)^(nt) + contributions, depending on contribution timing
Example
Enter an initial amount, recurring monthly contribution, annual rate, and years to estimate the ending balance and growth.
Frequently asked questions
What does the compound interest calculator show?
Estimate how an initial balance grows with recurring contributions and compound interest.
Are the results exact?
The result is calculated from the inputs and assumptions shown on this page. For important financial, health, tax, or legal decisions, verify the result with an appropriate professional or authoritative source.