Future Value Calculator

Calculate the future value of a starting amount plus periodic deposits or withdrawals, given a fixed interest rate per period.

About the Future Value Calculator

Calculate how a starting amount grows into a future value when it earns a fixed interest rate per period and receives a regular periodic deposit.

How the Future Value Calculator works

This calculator works directly in generic periods (N) and a rate per period (I/Y) — rather than years and an annual rate — so it applies equally to monthly, quarterly, or annual compounding as long as N and I/Y are expressed in matching units. Deposits made at the beginning of each period earn interest for one extra period compared to deposits made at the end.

How to use the Future Value Calculator

Enter the number of periods (N) over which the amount will grow.
Enter the starting amount (PV) you're investing today.
Enter the interest rate per period (I/Y).
Enter the periodic deposit (PMT) you'll contribute each period, and whether it's made at the beginning or end of the period.
Press Calculate to see the future value, present value, total deposits, total interest, and a breakdown chart.

Tips for the Future Value Calculator

Deposits made at the beginning of each period grow slightly more than deposits made at the end, since each one earns interest for an additional period.

Formula used by the Future Value Calculator

Future Value = PV × (1 + i)ᴺ + PMT × [(1 + i)ᴺ − 1] / i × (1 + i × k)
where i = interest rate per period, N = number of periods, k = 1 if PMT is made at the beginning of each period, 0 if at the end

Example: Future Value Calculator

10 periods of 5% growth with a $2,000 start and $100 periodic deposit

Periods (N): 10
Starting amount (PV): $2,000
Rate per period (I/Y): 5% (illustrative)
Deposit (PMT): $100, end of period

Result: Future value ≈ $4,515.58

$2,000 grown at 5% per period for 10 periods becomes about $3,257.79, and the $100 end-of-period deposits add roughly $1,257.78 more, for a total of about $4,515.58.