Axis

Time & duration

yoctosecondys

Yocto-scaled variant of the second, exactly ys = 0.000000000000000000000001 base unit.

Dimension
time
Canonical signature
T
System
si
Exactness
Exact

Definition record

How this unit is defined

Canonical base
1 ys = 1e-24 s
Conversion type
linear
Historical notes
Defined from the caesium-133 hyperfine transition frequency (SI 2019).
Aliases
yocto sec, yocto seconds, yocto secs

Same dimension

Related units

secondsisminutesi acceptedminhoursi acceptedhdaysi accepteddyear (Julian)astronomicalyrweeksi acceptedwkquettasecondsiQsronnasecondsiRs

Common conversions

Every conversion routes through the canonical base of the dimension.

1 ys = 1e-24 s

Exact relationship

10 ys = 1e-23 s

Exact relationship