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Rule of 69 Formula

GoDoubling Time Formula

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Doubling Time is the length of time required to double an investment or money in an interest-bearing account. Check FAQs

DT = \frac{69}{i}

DT - Doubling Time?i - Rate of Interest as Whole Number?

Rule of 69 Example

With values

With units

Only example

Here is how the Rule of 69 equation looks like with Values.

Here is how the Rule of 69 equation looks like with Units.

Here is how the Rule of 69 equation looks like.

3.45 = \frac{69}{20}

3.45 = \frac{69}{20}

3.45 = \frac{69}{20}

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Basics of Time Value of Money » fx Rule of 69

Rule of 69 Solution

Follow our step by step solution on how to calculate Rule of 69?

FIRST Step Consider the formula

DT = \frac{69}{i}

Next Step Substitute values of Variables

∴

DT = \frac{69}{20}

Next Step Prepare to Evaluate

∴

DT = \frac{69}{20}

LAST Step Evaluate

∴

DT = 3.45

Rule of 69 Formula Elements

Variables

Doubling Time

Doubling Time is the length of time required to double an investment or money in an interest-bearing account.

Symbol: DT

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Doubling Time

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.

Formulas to find Rate of Interest as Whole Number

Other Formulas to find Doubling Time

Go Doubling Time

DT = \log 10 \frac{2}{\log 10} (1 + \frac{%RoR}{100})

Other formulas in Basics of Time Value of Money category

Go Hamada Equation

β L = β UL \cdot (1 + (1 - T %) \cdot R D/E)

Go Number of Periods

n Periods = \frac{\ln (\frac{FV}{PV})}{\ln (1 + r)}

Go Doubling Time (Continuous Compounding)

DT CC = \frac{\ln (2)}{\frac{%RoR}{100}}

Go Rule of 72

Rule of 72 = \frac{72}{i}

How to Evaluate Rule of 69?

Rule of 69 evaluator uses Doubling Time = 69/Rate of Interest as Whole Number to evaluate the Doubling Time, The Rule of 69 formula is defined as a financial concept used to estimate the amount of time it takes for an investment to double in value, given a fixed annual rate of return. Doubling Time is denoted by DT symbol.

How to evaluate Rule of 69 using this online evaluator? To use this online evaluator for Rule of 69, enter Rate of Interest as Whole Number (i) and hit the calculate button.

FAQs on Rule of 69

What is the formula to find Rule of 69?

The formula of Rule of 69 is expressed as Doubling Time = 69/Rate of Interest as Whole Number. Here is an example- 3.45 = 69/20.

How to calculate Rule of 69?

With Rate of Interest as Whole Number (i) we can find Rule of 69 using the formula - Doubling Time = 69/Rate of Interest as Whole Number.

What are the other ways to Calculate Doubling Time?

Here are the different ways to Calculate Doubling Time-

Doubling Time=log10(2)/log10(1+Rate of Return/100)

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