THE RULE OF 72
The rule of 72 helps to determine how many years it will take to double your money. Input your own value in the formula below.
72
divided by
  =   Years to double investment
%
interest rate you can get



You can also use it to determine what interest rate you need
to double your money in a set amount of years. Input your own value in the formula below.
72
divided by
  =   % Interest rate required

Years to double investment



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