1 E-25 s and less

To help compare orders of magnitude of different times this page lists times less than 10^-24 seconds (1 yoctosecond) See also times of other orders of magnitude.

• 10^-44 seconds after the Big Bang: space and time separate
• 5.4 x 10^-44 seconds is Planck time, the smallest measurable unit of time. Some round this to 10^-43
• 10^-28 seconds after the Big Bang: start of cosmic inflation
• longer times