# Magnitude (time)

This is a compilation of times of various orders of magnitude for comparison purposes. The information is often to be understood as “typical values”; the converted values ​​are rounded.

The basic unit of time in the international system of units is 1  second ( unit symbol s ), the formula symbol t .

Further units used below:

• 1 min = 60 s ( minute )
• 1 h = 3600 s ( hour )
• 1 d = 86,400 s ( day )
• 1 a = 365.2425 d = 31,556,952 s ( year )

## Times shorter than 10 −6 s (1 µs)

• 5.4 · 10 −44 s - Planck time . At times of this magnitude the range of validity of the established physical theories ends . Some extensions assume that time is quantized on this scale .
• 2 · 10 −22 s - half-life of the isotope nitrogen -10
• approx. 1 as (1 · 10 −18 s) - smallest currently measurable time interval
• 67 as (6.7 · 10 −17 s) - shortest electromagnetic impulses generated so far by means of an attosecond laser
• 1.3 to 2.5 fs (around 2 · 10 −15 s) - period of visible light
• 200 fs (2 · 10 −13 s) - fastest chemical reactions , e.g. reaction of the pigments in the eye to light
• 333 ps (3.33 · 10 −10 s) - clock time for a processor with 3 GHz clock frequency

## 10 −6 s to 10 −3 s (1 µs to 1 ms)

• 1 µs - flash duration of a standard high-speed stroboscope
• 2.2 µs - lifetime of muons
• 22.7 µs - sampling interval for digital sound recordings in CD quality ( sampling rate 44.1 kHz)
• 33 µs - period of the highest audible tone (frequency 30 kHz)
• 125 µs - sampling interval for sound recordings in telephone quality (sampling rate 8 kHz)
• 400 µs - duration of the main discharge of a lightning bolt

## 10 −3 s (1 ms) to 1 s

• 1 ms - typical flash duration for photo flash units
• 2.27 ms - period of the concert pitch (a ') in music (440 Hz)
• 3 ms - wing flap of a house fly (approx. 300 Hz)
• 5 ms - flapping wings of a honey bee
• 8 ms - shutter speed of a camera with setting "125" (1/125 second)
• 16.67 ms - tertie , sixtieth part of a second (obsolete unit)
• 20 ms - period of 50 Hz AC voltage in European power grids
• 33 ms - period of the lowest audible tone (frequency 30 Hz)
• approx. 40 ms - airbag deployment in the vehicle after activation signal (accident)
• approx. 100 ms - the blink of an eye ; human response time
• 128 ms - period of an electromagnetic standing wave that runs around the earth (see Schumann resonance )
• approx. 200–670 ms - a beat in contemporary dance music

## 1 s to 10 s

• 1 s = 1 second = 1/60 minute
• 1 s - heartbeat (average heart rate of adults at rest)
• 1.26 s - transit time of light between the earth and the moon
• 3.156 s (approximately " pi s") - a "nano century" or the 10 7th part of a year (popular rule of thumb for approximate conversion of times between seconds and years)
• approx. 5 s - duration of a typical adult breath
• 9.58 s - world record in the men's 100-meter run (as of March 2014)

## 10 s to 100 s

• 10.49 s - world record in the 100-meter run for women (as of March 2014)
• about 30 seconds - the average length of a TV - commercials
• 60 s = 1 minute (1 min)

## 100 s to 10 3 s (16.67 min)

• 180 s = 3 min - cooking time for typical finished pasta products
• 420 s = 7 min - “Al dente” cooking time for durum wheat pasta
• approx. 500 s = 8 min 20 s - transit time of light between sun and earth
• 881 s - mean lifetime of a free neutron

## 10 3 s to 10 4 s (16.67 min to 2.778 h)

• approx. 43.3 min - transit time of light between the sun and Jupiter
• 45 min - time of a school lesson in Germany
• 50 min - time of a school lesson in Austria
• 60 min = 1 hour (1 h)
• approx. 80 min - transit time of light between the sun and Saturn
• approx. 90 min - orbital time of space stations
• approx. 160 min - transit time of light between the sun and Uranus

## 10 4 s to 10 5 s (2.778 h to 27.78 h)

• approx. 4.17 h - transit time of light between the sun and Neptune
• approx. 6.77 h - transit time of light between the sun and Pluto
• 8 h - typical working hours in western countries; typical daily sleep requirement of adults
• 23 h 56 min 4 s - duration of one revolution of the earth around its own axis
• 24 h = 1 day (1 day )

## 10 6 s to 10 7 s (11.6 d to 116 d)

• 27.3217 d - a sidereal month
• 28 d or 29 d - length of the month of February
• 29 d - average length of a woman's period
• 29.53059 d - middle synodic month
• 30 d = 1 legal month (according to § 191 BGB)
• 30d - length of the months of April, June, September, November
• 31 d - length of the months January, March, May, July, August, October, December
• 87d 23.3 h - one orbit of the planet Mercury around the sun

## 10 9 s to 10 10 s (31.7 a to 317 a)

• 40,988 a - Duration of the German Democratic Republic (October 7, 1949 - October 3, 1990)
• 47.81 a - Duration of the German Empire (January 18, 1871 - November 9, 1918)
• 80 a - average human life expectancy in the western world
• 84.0 a - one orbit of the planet Uranus around the sun
• 100 a = 1 century (hectode)
• 122 a - highest known human lifespan
• 164.8 a - one orbit of the planet Neptune around the sun
• 247.7 a - one orbit of the dwarf planet Pluto around the sun
• 287.8 a - one orbit of the asteroid (50,000) quaoar around the sun

## Times longer than 10 12 s ≈ 31,689 a

10 13 s ≈ 316,888 a
10 14 s ≈ 3,168,876 a ~ 3.17 Ma
• 4 Ma - estimated average lifetime of a species
10 15 s ≈ 31,688,764 a ~ 31.7 Ma
10 16 s ≈ 317 Ma
10 17 s ≈ 3.17 Ga
10 20 s ≈ 3.1688 10 12 a ≈ 3.17 Ta
• 10 Ta - lifespan of the smallest red dwarfs
• 7.2 · 10 24 a - half-life of the isotope tellurium -128 (slowest measured decay of all atomic nuclei)
• 10 36 a - assumed time scale of proton decay in some physical theories
• 10 69 a - typical lifetime of stellar black holes
• 10 106 a - Lifetime of the largest known black hole

## Individual evidence

1. Research by the Max Planck Institute for Quantum Optics , u. a. with these publications ( Memento of the original from January 16, 2013 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.