In order to find the future value you need to use this formula:
PV= Present Value
i= interest rate
t= periods (time)
Remember your compound periods (this is how many times you compound the interest) :
Let's do an example:
Find the future value of $1000 dollars compound quarterly with an interest of 12% for 4 years.
In the financial calculator this is the input to find the future value:
Since you are compounding quartely first find out the number of periods by multiplying 4 years by 4 periods, therefore you have 4X4= 16 periods, also you need to divide the rate by 4, 12/4 = 3%.
Now you can plug it in the calculator:
PV= -1000 (the pv must be negative or the calculator will give you an error)