Microsecond to Second Converter

Microsecond

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. A microsecond is equal to 1000 nanoseconds or 1⁄1,000 of a millisecond.

Second

The second (symbol: s) is the SI base unit of time. The second is defined by taking the fixed numerical value of the caesium frequency, Δν_Cs, the unperturbed ground-state hyperfine transition frequency of the caesium 133 atom, to be 9192631770 when expressed in the unit Hz, which is equal to s–1.

Because the speed of Earth's rotation varies and is slowing ever so slightly, a leap second is added at irregular intervals to civil time to keep clocks in sync with Earth's rotation.

One minute is equal to 60 seconds. Camera shutter speeds are often expressed in fractions of a second, such as 1⁄30 second or 1⁄1000 second. The first timekeepers that could count seconds accurately were pendulum clocks invented in the 17th century. Starting in the 1950s, atomic clocks became better timekeepers than Earth's rotation, and they continue to set the standard today.

Microseconds To Seconds Table