php microtime help (more or less a math problem)

[Dr.CustUmz]

ANOTHER EDIT ***
I still dont think this is right, my math has shown it to be a nano second... can someone please help this is bugging me so bad.

ok deleted everything before this is seriously bugging me lol i have it looking good, but what good is appearance if i dont know what its meaning -_-

so i take (excuse if any typos it is working on the real version)

PHP Code:

$pageloadstart = microtime(TRUE); 


on one end, and on the other end

PHP Code:

$pageloadstop = microtime(TRUE); 


then I do

PHP Code:

$pageloadtotal = $pageloadstop - $pageloadstart.' ?micro seconds?'; 


the result turns out to be a digit like this
0.048259973526001

what is this output... mili micro nano.... second



so if i times it by 1000 and only show 2 decimals so it displays as

48.26

what do i call this...
can i say its 48.26 milli seconds?

im so lost!

my logic behind my thinking is if i have 1,650,000$

i can say i have 1.65 million dollars...

need some help =/

--------------- Added [DATE]1460872683[/DATE] at [TIME]1460872683[/TIME] ---------------

$pageloadstop - $pageloadstart = 0.0482645645456465

PHP Code:

number_format(($pageloadstop - $pageloadstart) * 1000, 2) 


returns 48.26

this is the formula I cant figure out what type of second it is =/