Moments to Seconds (moment to s)
1 moment equals 90 seconds exactly.
How to convert moments to seconds
To convert moments to seconds, multiply the number of moments by 90. This factor is exact. To go the other way, multiply seconds by 0.01111111111 (rounded).
seconds = moments × 90
Example: 10 moments = 900 seconds.
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.
Approximate value. Standards for the moment varied by place and period, so this converter uses the most commonly cited value. Treat results as estimates, not exact figures.
About these units
Moment (moment)
About ninety seconds, one fortieth of a solar hour. A medieval unit of time described by the English monk Bede.
Medieval computists, the scholars who worked out the calendar and the date of Easter, used the moment as a small slice of the hour. The Venerable Bede described it in the 8th century. It was one fortieth of a solar hour, measured by the motion of a sundial shadow, and since the solar hour varied with the season, the moment was not fixed.
On average a moment equalled about 90 seconds, which is the figure used here. Bede's scheme also had the punctum at four per hour, the minutum at ten and the pars at fifteen, so a day held 960 moments. Bartholomeus Anglicus and Roger Bacon later wrote about the system, and Bacon subdivided the moment into 12 ounces of 47 atoms each. The modern phrase a moment is much looser, and the ostent that Bacon mentioned is seen as a forerunner of the modern minute.
1 moment = 90 seconds (approximately).
Sources: Wikipedia: Moment (time)
Second (s)
The SI base unit of time, defined by the radiation frequency of the cesium-133 atom: 9,192,631,770 cycles per second.
Our word second is a leftover of Latin. Medieval scholars divided a degree, and later the hour, into 60 parts called pars minuta prima, the first small part, and divided those again into pars minuta secunda, the second small part. NIST traces the roots further back: Babylonian and Greek astronomers split the circle into 360 degrees, and around 150 C.E. Ptolemy split each degree into 60 minutes and each minute into 60 seconds. Clocks that could show seconds appeared only in the later 16th century, and Christiaan Huygens's pendulum clock of 1656 was the first able to keep time accurately to the second.
For most of history the second was a fraction of a day, and in 1956 it was redefined as a fraction of the tropical year, a definition the SI took over in 1960. In 1967 the 13th CGPM switched to atoms: 9,192,631,770 periods of the radiation tied to a hyperfine transition of caesium-133. The 2019 SI revision restated this by fixing the caesium frequency at 9,192,631,770 hertz. NIST reports that commercial caesium clocks stay within about a three-millionth of a second per year, and experimental clocks based on other atoms are roughly ten thousand times more precise.
The second is the reference unit for time on this site.
Sources: NIST: the second and the SI redefinition; BIPM: SI Brochure, 9th edition; Wikipedia: Second
Related conversions
- Seconds to moments (reverse)
- Moments to minutes
- Moments to hours
- Moments to days
- Moments to weeks
- Moments to months
- Moments to years
- Minutes to seconds
- Hours to seconds
- Days to seconds
- Weeks to seconds
- Months to seconds
- Years to seconds
- Milliseconds to seconds
- Microseconds to seconds
- Nanoseconds to seconds
- Decades to seconds
- Centuries to seconds
- Millennia to seconds
See all time units.