Rule of 72 Solution

STEP 0: Pre-Calculation Summary
Formula Used
Rule of 72 = 72/Rate of Interest as Whole Number
Rule of 72 = 72/i
This formula uses 2 Variables
Variables Used
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.
Rate of Interest as Whole Number - Rate of Interest as Whole Number is the given interest rate presented as a whole number.
STEP 1: Convert Input(s) to Base Unit
Rate of Interest as Whole Number: 20 --> No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Rule of 72 = 72/i --> 72/20
Evaluating ... ...
Rule of 72 = 3.6
STEP 3: Convert Result to Output's Unit
3.6 --> No Conversion Required
FINAL ANSWER
3.6 <-- Rule of 72
(Calculation completed in 00.004 seconds)

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Basics of Time Value of Money Calculators

Number of Periods
​ Go Number of Periods = ln(Future Value/Present Value)/ln(1+Rate per Period)
Hamada Equation
​ Go Leveraged Beta = Unleveraged Beta*(1+(1-Tax Rate)*Debt to Equity (D/E))
Doubling Time
​ Go Doubling Time = log10(2)/log10(1+Rate of Return/100)
Doubling Time (Continuous Compounding)
​ Go Doubling Time Continuous Compounding = ln(2)/(Rate of Return/100)

Rule of 72 Formula

Rule of 72 = 72/Rate of Interest as Whole Number
Rule of 72 = 72/i

How to Calculate Rule of 72?

Rule of 72 calculator uses Rule of 72 = 72/Rate of Interest as Whole Number to calculate 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 calculate Rule of 72 using this online calculator? To use this online calculator for Rule of 72, enter Rate of Interest as Whole Number (i) and hit the calculate button. Here is how the Rule of 72 calculation can be explained with given input values -> 3.6 = 72/20.

FAQ

What is 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 and is represented as Rule of 72 = 72/i or Rule of 72 = 72/Rate of Interest as Whole Number. Rate of Interest as Whole Number is the given interest rate presented as a whole number.
How to calculate 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 is calculated using Rule of 72 = 72/Rate of Interest as Whole Number. To calculate Rule of 72, you need Rate of Interest as Whole Number (i). With our tool, you need to enter the respective value for Rate of Interest as Whole Number and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
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