Metric time is the practice of applying metric prefixes to time measurements. It uses the second as its base unit of time, rather than the more conventional measurements which are based on the day.
Problems[]
Problems arise when when using metric time. Values below 10-3 and above 103 quickly become impractical for measuring human activities.
Multiple | Name of Unit | Seconds | Minutes | Hours | Days | Years | Human |
---|---|---|---|---|---|---|---|
10-3 | millisecond | 0.001 | 0.0000167 | 1 ms | |||
10-2 | centisecond | 0.01 | 0.000167 | 10 ms | |||
10-1 | decisecond | 0.1 | 0.00167 | 100 ms | |||
100 | second | 1 | 1 s | ||||
101 | decasecond | 10 | 0.167 | 10 s | |||
102 | hectosecond | 100 | 1.667 | 0.028 | 1 m 40 s | ||
103 | kilosecond | 1,000 | 16.667 | 0.278 | 16 m 40 s | ||
104 | myriasecond | 10,000 | 166.667 | 2.778 | 0.116 | 2 h 46 m 40 s | |
105 | metric day | 100,000 | 1,666.667 | 27.778 | 1.158 | 0.003 | 1 d 3 h 46 m 40 s |
10^-12 | picosecond | 0.000000000001 | 1.666667*10^-14 | 2.7778*10^-16 | 1.16*10^-17 | axprox3*10^-20 | 1 |
107 and 108 are currently not defined | |||||||
* The "myria" prefix was abrogated (officially retired) in 1960. ** "Metric day" is an unofficial/ad hoc definition. |
Likewise, adding metric prefixes to units of time such as the week also results in values that are difficult to use. Example
In the last example, the name alone is more cumbersome than simply saying "forty-nine weeks".
While the metric system provides a uniform way of counting time, implementing it requires a significant number of decimal places used for the values and becomes cumbersome, especially when compared with measurements based on the rotation of the Earth on its axis and around the sun, such as the day, year and longer measurements like the millennium.
For example, there are 295 days before October 23 in a year that is not a leap year, which equals 25,488,000 seconds. 2:57 p.m. and 47 seconds on October 23 adds 1,126,667 seconds, for a total of 26,614,667 seconds. Expressing this as gigaseconds equals 0.026614667 gigaseconds.
External links[]
- MetricTime.eu showing live metric time
- Metric prefixes at Wikipedia
- Metric clock showing live metric time