Nanosecond vs. Microsecond — What's the Difference?

A nanosecond (ns) is an SI unit of time equal to one billionth of a second, that is, 1⁄1 000 000 000 of a second, or 10−9 seconds. The term combines the prefix nano- with the basic unit for one-sixtieth of a minute.

A microsecond is an SI unit of time equal to one millionth (0.000001 or 10−6 or 1⁄1,000,000) of a second. Its symbol is μs, sometimes simplified to us when Unicode is not available.

One billionth (10-9) of a second.

One millionth (10-6) of a second.

A measure of time equal to one billionth of a second.

It is commonly represented with symbol µs.

One billionth of a second; one thousandth of a microsecond

One millionth of a second; one thousandth of a millisecond