To help compare orders of magnitude of different times this page lists times between 10^-16 seconds and 10^-15 seconds (100 attoseconds and 1 femtosecond) See also times of other orders of magnitude.

• shorter times
• about 100 as – record for shortest time interval measured as of February 2004 (BBC News)
• about 200 as – half-life of beryllium-8 which is important for stellar nucleosynthesis
• 250 as – the shortest pulses of laser light yet created (2002)
• longer times