There are 0.001 milliseconds in a mircrosecond. A millisecond is one one thousandth of a second or .001 seconds. a microsecond is one one millionth of a second or .000001 seconds. A better question would be the opposite. How many microseconds are there in a millisecond? That would be a 1000.
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Those are really measures of time, not of "fastness" or speed.But if something takes less time, you can say that it occurs faster - in this case, 1 microsecond is less time, and therefore faster.
1 second = 1,000,000 (one million) microseconds
There are 5 seconds in 5000 microseconds. This is because 1 microsecond is equal to one-millionth of a second.
There is a yoctosecond in a MKS (metric system) 1000 yoctoseconds - 1 zeptosecond 1000 zeptoseconds = 1 attosecond 1000 attoseconds = 1 femtosecond 1000 femtoseconds = 1 picosecond 1000 picoseconds = 1 nanosecond 1000 nanoseconds = 1 microsecond 1000 microseconds = 1 millisecond 1000 milliseconds = 1 second 1,000,000,000,000,000 yoctoseconds in a nanosecond
1 microsecond