Rule of 72 Formula

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Rule of 72 is a simplified way to determine how long an investment will take to double, given a fixed annual rate of interest. Check FAQs
Rule of 72=72i
Rule of 72 - Rule of 72?i - Rate of Interest as Whole Number?

Rule of 72 Example

With values
With units
Only example

Here is how the Rule of 72 equation looks like with Values.

Here is how the Rule of 72 equation looks like with Units.

Here is how the Rule of 72 equation looks like.

3.6Edit=7220Edit
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Rule of 72 Solution

Follow our step by step solution on how to calculate Rule of 72?

FIRST Step Consider the formula
Rule of 72=72i
Next Step Substitute values of Variables
Rule of 72=7220
Next Step Prepare to Evaluate
Rule of 72=7220
LAST Step Evaluate
Rule of 72=3.6

Rule of 72 Formula Elements

Variables
Rule of 72
Rule of 72 is a simplified way to determine how long an investment will take to double, given a fixed annual rate of interest.
Symbol: Rule of 72
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Rate of Interest as Whole Number
Rate of Interest as Whole Number is the given interest rate presented as a whole number.
Symbol: i
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.

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​Go Doubling Time (Continuous Compounding)
DTCC=ln(2)%RoR100

How to Evaluate Rule of 72?

Rule of 72 evaluator uses Rule of 72 = 72/Rate of Interest as Whole Number to evaluate the Rule of 72, Rule of 72 is a simplified way to determine how long an investment will take to double, given a fixed annual rate of interest. Rule of 72 is denoted by Rule of 72 symbol.

How to evaluate Rule of 72 using this online evaluator? To use this online evaluator for Rule of 72, enter Rate of Interest as Whole Number (i) and hit the calculate button.

FAQs on Rule of 72

What is the formula to find Rule of 72?
The formula of Rule of 72 is expressed as Rule of 72 = 72/Rate of Interest as Whole Number. Here is an example- 3.6 = 72/20.
How to calculate Rule of 72?
With Rate of Interest as Whole Number (i) we can find Rule of 72 using the formula - Rule of 72 = 72/Rate of Interest as Whole Number.
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