How do I calculate the amount I need to save for retirement taking inflation into consideration?

For example, let's assume I need my investments to provide $100,000 per year for 30 years once I retire at the age of 60. Assuming a 4% withdrawal rate, I need $2,500,000 in my retirement nest egg. Let's say I'm 30 years old, so I have 30 years to save and invest in order to reach $2,500,000. Let's assume I achieve a lifetime real return of 6% per year.

How do I calculate how much I need to save in order to reach my goal of $2,500,000? Do I simply use a compounding interest calculator such as this on bankrate.com and just plug in my variables?

Another question is how do I factor inflation into all of this? Saving x dollars per month in order to reach a nest egg of $2,500,000 is only applicable in 2017 dollars, but not in 2047 when I will retire in the example I gave.

For example, let's assume I need my investments to provide $100,000 per year for 30 years once I retire at the age of 60. Assuming a 4% withdrawal rate, I need $2,500,000 in my retirement nest egg. Let's say I'm 30 years old, so I have 30 years to save and invest in order to reach $2,500,000. Let's assume I achieve a lifetime real return of 6% per year.

How do I calculate how much I need to save in order to reach my goal of $2,500,000? Do I simply use a compounding interest calculator such as this on bankrate.com and just plug in my variables?

Another question is how do I factor inflation into all of this? Saving x dollars per month in order to reach a nest egg of $2,500,000 is only applicable in 2017 dollars, but not in 2047 when I will retire in the example I gave.

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