Attosecond conversions

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Time Conversions: attosecond conversions - convert attoseconds to:
Convert attoseconds to

The online converter calculator on this page allows you to select the time measurement unit you want to convert to starting from attoseconds (as). To make a conversion starting from a unit of time other than attosecond, simply click on the "Reset" button.

What is attosecond?


The attosecond is a unit of time in the metric system equal to one quintillionth of a second (1 as = 10-18 s), the base unit of time in the International System of Units (SI). It is also equal to 0.001 femtoseconds (fs), or 10-9 nanoseconds (ns), or 10-12 microseconds (μs) or 10-15 milliseconds (ms), which are SI units of time.

The attosecond is the shortest unit of time that can be directly measured. Times of this magnitude (i.e., on the attosecond time scale) are used in science for atomic physics calculations. The atomic unit of time is equal to 2.418884326505(16)x10-17 seconds or 24.18884326505(16) attoseconds.