Luckily, there is a simple formula for finding
future value:
PV
= FV_{n} / (1 + i)_{n} 
PV 
the present value (or initial principal) 
FV_{n} 
future value at the end of n periods 
i 
the interest rate paid each period 
n 
the number of periods 

Example:
Using the attached future
value table, or a calculator or spreadsheet,
compute how much a 30year government bond face
amount $10,000 at 8.5% interest (compounded annually)
would pay at maturity?
Answer:
$115,582.52. You can see how this was computed
on the attached
spreadsheet. Notice that the spreadsheet answer
is more accurate than using the tables, which
are accurate only to four decimal places and create
roundoff errors when interest rates or terms
are not whole numbers. 