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How long to double money at 7.575 percent?


Here we will show you how to calculate how long it will take to double your money with 7.575 percent interest.

Basically, you want to know how far into the future until your present investment, with 7.575 percent interest, will be twice as much.

The formula to calculate this is:

n = ln(2)/r

Where n is time, r is percent and ln(2) is 0.69314718056 per our calculator.

Therefore, the answer is simply 0.69314718056 / 0.07575 which is

9.15 years


We assumed the 7.575 percent was the yearly rate. If the 7.575 percent is the monthly rate, then simply replace years with months above.

You may have heard of "the rule of 72", where you use 72 and 7.575 instead of 0.69314718056 and 0.07575 as follows: 72/7.575 = 9.50 years.

The rule of 72 does not give the exact answer, as our answer did above, but it is good to know if you only need an approximate answer and you don't have access to Research Maniacs.





How long to double money?
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How long to double money at 7.58 percent?
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