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The hour (common symbol: h or hr, h being the international form of the symbol) is a unit of measurement of time. In modern usage, an hour comprises 60 minutes, or 3,600 second ..more definition+
In relation to the base unit of [time] => (seconds), 1 Atomic Unit Of Time (au) is equal to 2.418884254E-17 seconds, while 1 Hours (hr) = 3600 seconds.| 639000000 Atomic Unit Of Time | to common time units |
|---|---|
| 639000000 au | = 1.545667038306E-8 seconds (s) |
| 639000000 au | = 2.57611173051E-10 minutes (min) |
| 639000000 au | = 4.29351955085E-12 hours (hr) |
| 639000000 au | = 1.7889664795208E-13 days (day) |
| 639000000 au | = 2.5556663993155E-14 weeks (wk) |
| 639000000 au | = 4.9012780260845E-16 years (yr) |
| 639000000 au | = 5.8815336313014E-15 months (mo) |
| 639000000 au | = 4.9006564309004E-17 decades (dec) |
| 639000000 au | = 4.9006564309004E-18 centuries (cent) |
| 639000000 au | = 4.9006564309004E-19 millenniums (mill) |