Difference between revisions of "Rule of 72"

(rule of 72, a useful finance trick.)
 
m
 
(4 intermediate revisions by 3 users not shown)
Line 1: Line 1:
−
The Rule of 72 is used to estimate [[Interest|compound interest]], specifically how long it takes money to double under a given interest rate. The number 72 is placed into the [[Numerator|numerator]] and the rate of interest in the [[Denominator|denominator]]. The quotient is the number of years needed for the money to double, up to a small [[Rounding_error|rounding error]].
+
The '''Rule of 72''' is a rule of thumb used to estimate how long it takes money invested to double at a given interest rate.
 +
 
 +
The number 72 is placed into the [[numerator]] and the rate of interest (as a whole number) in the [[denominator]], with the quotient being the approximate number of years (subject to rounding error).  For example, if an interest rate is 6%, it will take approximately 12 years (72/6) for the investment to double.
  
 
[[Category:Finance]]
 
[[Category:Finance]]
−
[[Category:Mathematics]]
 

Latest revision as of 23:49, March 24, 2019

The Rule of 72 is a rule of thumb used to estimate how long it takes money invested to double at a given interest rate.

The number 72 is placed into the numerator and the rate of interest (as a whole number) in the denominator, with the quotient being the approximate number of years (subject to rounding error). For example, if an interest rate is 6%, it will take approximately 12 years (72/6) for the investment to double.