Shakes to Weeks (shake to wk)
1 shake equals 1.653439153×10⁻¹⁴ weeks (rounded).
How to convert shakes to weeks
To convert shakes to weeks, multiply the number of shakes by 1.653439153×10⁻¹⁴. The factor is rounded to 10 significant digits. To go the other way, multiply weeks by 60,480,000,000,000.
weeks = shakes × 1.653439153×10⁻¹⁴
Example: 10 shakes = 1.653439153×10⁻¹³ weeks.
Months and years are not constant. This site uses the average Gregorian year of 365.2425 days, so one 'year' converts to 365.2425 days, not 365; use 'common year' for exactly 365 days.
About these units
Shake (shake)
Exactly 10 nanoseconds. Coined at the Manhattan Project for nuclear chain reactions, from the phrase 'two shakes of a lamb's tail'.
Physicists on the wartime Manhattan Project needed a handy name for an interval that kept turning up in their chain-reaction calculations, and they settled on the shake. It is defined as 10 nanoseconds, or 10 to the power of minus 8 second. The name plays on the English idiom about something happening in two shakes of a lamb's tail, meaning very quickly.
One step of a fission chain, in which a neutron causes a fission that releases more neutrons, takes roughly one shake, and a whole reaction is typically over within 50 to 100 shakes, according to Wikipedia. The shake was coined in the same circle and for similar reasons as the barn, a unit of cross-sectional area. It is an informal metric unit rather than an SI unit. A shake equals 10,000 picoseconds, and 100 million shakes make one second.
1 shake = 1×10⁻⁸ seconds (exactly).
Sources: Wikipedia: Shake (unit); Wikipedia: Picosecond
Week (wk)
Seven days. The seven-day week comes from the ancient Near East and is nearly universal in the modern calendar.
Nothing in the sky produces a seven-day cycle, which makes the week a human invention with a contested pedigree. Babylonians marked the 7th, 14th, 21st and 28th of the lunar month as special, but that was not a continuous cycle. A continuous seven-day cycle tied to the Sabbath is attested in Judaism by the 6th century BC at the latest, and scholars disagree on whether it was borrowed from Babylon or developed independently. The Romans later used a week named for the Sun, the Moon and the five visible planets, and in AD 321 Emperor Constantine decreed it across the empire.
A week is seven days, or 604,800 seconds, and it divides evenly into neither months nor years, which is why calendars shift against it. The ISO 8601 standard starts each week on Monday and assigns week 1 to the week containing the year's first Thursday, so some years have a week 53. Other societies used different lengths: Rome had an eight-day market cycle, and revolutionary France used a ten-day week from 1793 to 1802. The English word comes from Old English wice, meaning a turn or succession.
1 week = 604,800 seconds (exactly).
Sources: Wikipedia: Week; Wikipedia: ISO week date
Related conversions
- Weeks to shakes (reverse)
- Shakes to seconds
- Shakes to minutes
- Shakes to hours
- Shakes to days
- Shakes to months
- Shakes to years
- Seconds to weeks
- Minutes to weeks
- Hours to weeks
- Days to weeks
- Months to weeks
- Years to weeks
- Milliseconds to weeks
- Microseconds to weeks
- Nanoseconds to weeks
- Decades to weeks
- Centuries to weeks
- Millennia to weeks
See all time units.