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A decade is a period of 10 years. The word is derived from the Ancient Greek: δεκάς (transliteration=dekas), which means a group of ten. Other words for spans of years also c ..more definition+
In relation to the base unit of [time] => (seconds), 1 Decades (dec) is equal to 315400000 seconds, while 1 Callippic Cycles (cali) = 2398377600 seconds.| 1991000000000 Decades | to common time units |
|---|---|
| 1991000000000 dec | = 6.279614E+20 seconds (s) |
| 1991000000000 dec | = 1.0466023333333E+19 minutes (min) |
| 1991000000000 dec | = 1.7443372222222E+17 hours (hr) |
| 1991000000000 dec | = 7.2680717592593E+15 days (day) |
| 1991000000000 dec | = 1.0382959656085E+15 weeks (wk) |
| 1991000000000 dec | = 19912525367834 years (yr) |
| 1991000000000 dec | = 2.38950304414E+14 months (mo) |
| 1991000000000 dec | = 1991000000000 decades (dec) |
| 1991000000000 dec | = 199100000000 centuries (cent) |
| 1991000000000 dec | = 19910000000 millenniums (mill) |