Is standard deviation relative to the mean? I am working with real estate asset values and prices are in millions of \$.
Typical commercial Asset values are \$10m, \$12m, \$15m, \$9m. Would my standard deviation in this case also be in millions and would it be relative to the mean?
I typically hear 1/2/3 std deviations, so wanted to confirm how std is expressed for large values such as asset prices.

Standard deviation is just the number outputted by that $s=\sqrt{\dfrac{1}{n-1}\sum_{i=1}^n(x_i-\bar x)^2}$ formula. If it’s in the millions, so be it.
(There are other ways to calculate standard deviation, but this is the most common.)
What you hear is when people use standard deviation as a unit. If the standard deviation is a million, then two standard deviations above the mean is two million above the mean.
