Show a chart on the Shortest Time to the longest time


Here's a table showing time units from shortest to longest, including zeptoseconds and Planck time: [1]

Unit Description Scientific Notation (Seconds)
Planck Time The shortest time interval that is physically meaningful. ~10^-44
Yoctosecond One septillionth of a second (10^-24 s) 10^-24
Zeptosecond One sextillionth of a second (10^-21 s) 10^-21
Attosecond One quintillionth of a second (10^-18 s) 10^-18
Femtosecond One quadrillionth of a second (10^-15 s) 10^-15
Picosecond One trillionth of a second (10^-12 s) 10^-12
Nanosecond One billionth of a second (10^-9 s) 10^-9
Microsecond One millionth of a second (10^-6 s) 10^-6
Millisecond One thousandth of a second (10^-3 s) 10^-3
Second The fundamental unit of time 1
Minute 60 seconds 60
Hour 60 minutes (3600 seconds) 3600
Day 24 hours (86400 seconds) 86400
Week 7 days (604800 seconds) 604800
Month Approximately 30 days (2.628 million seconds) 2.628 x 10^6
Year Approximately 365 days (31.536 million seconds) 3.1536 x 10^7
Decade 10 years (3.1536 x 10^8 seconds) 3.1536 x 10^8
Century 100 years (3.1536 x 10^9 seconds) 3.1536 x 10^9
Millennium 1000 years (3.1536 x 10^10 seconds) 3.1536 x 10^10
Age of the Earth Approximately 4.54 billion years (1.43 x 10^16 seconds) 1.43 x 10^16
Age of the Universe Approximately 13.8 billion years (4.35 x 10^16 seconds)

The shortest time unit measured to date is the zeptosecond, which is 10^-21 seconds. While there are theoretical units shorter than a zeptosecond, such as the yoctosecond (10^-24 seconds), they are not currently measurable. The Planck time, approximately 5.39 x 10^-44 seconds, is considered the theoretical shortest unit of time, representing the time it takes light to travel one Planck length. So, in order from shortest to longest time unit, it would be: zeptosecond, yoctosecond, Planck time.