Future Value Calculator
See what your regular saving habit could actually turn into. This tool splits the result into what you put in and what compounding adds for you, so you can see the difference for yourself.
Fill in your numbers above and calculate to see your result explained.
Your next step will appear here once you calculate.
What future value actually tells you
Future value is the amount your money becomes after time and interest do their work. It answers one plain question. If you keep saving the way you are planning to, what will you actually end up with?
Think of it like planting a small orchard. Your starting amount is the trees you plant today. Your regular contribution is a new tree you plant every season. Interest is the fruit each tree produces, which you then use to plant even more trees. Over enough seasons, the fruit from fruit starts producing more than the trees you planted yourself.
The formula, broken down
The navy part of the formula grows your starting amount on its own. The gold part grows every contribution you add along the way. Add both together and you get the teal number, your total interest earned, once you subtract what you actually paid in.
A worked example
Imagine you open a savings account with $1,000. You add $100 every month. Your bank pays 6% interest per year, compounded monthly.
The monthly rate is 6% divided by 12, which is 0.5% per month. Over 10 years, that is 120 monthly periods.
Run those numbers through the formula above and your balance grows to about $18,207. You put in $1,000 to start and added $12,000 over 10 years. That is $13,000 from your own pocket.
The remaining $5,207 came from interest your money earned on itself, without you adding another dollar.
Why the same contribution grows faster the longer you wait
Early on, most of your balance is simply the money you deposited. Interest earned on interest looks small at first because there is not much of it yet.
Given enough years, that interest compounds on itself and starts producing more growth than your own contributions do. This is why financial advisors often say time matters more than the amount you start with.
A small trap to watch for. Stopping contributions early does not just pause your progress. It removes years of future compounding on the money you would have added, which is usually the most costly part of stopping too soon.
Frequently asked questions
What is future value in simple terms?
Future value is what your money grows into after time and interest. It combines what you start with, what you add, and what interest adds on top.
How is future value different from present value?
Present value works backward from a future goal to find what it is worth today. Future value works forward from today toward a later amount.
Does this calculator include inflation?
No. It shows growth in today’s dollars, before inflation reduces buying power. Subtract your expected inflation rate from the interest rate for a rough real return.
What happens if I stop contributing partway through?
Run the calculator again using the years you actually contributed. Then use that ending balance as your new starting amount for the years left.
How accurate is this compared to a real bank or brokerage account?
It assumes a steady rate and regular contributions, which real accounts rarely follow exactly. Use it to compare scenarios, not to predict an exact balance.
Want to see how a lump sum grows completely on its own?
Try the Compound Interest Calculator next, or explore the full toolkit for more planning tools.