The time difference between Perth and San Francisco is 15 hours. When it is 12:00 noon in Perth, it is 21:00 in San Francisco. Perth uses the Australia/Perth time zone (UTC+8), while San Francisco uses America/Los_Angeles (UTC-7).
| Detail | Perth | San Francisco |
|---|---|---|
| Time Zone ID | Australia/Perth | America/Los_Angeles |
| UTC Offset | UTC+8 | UTC-7 |
| Abbreviation | AWST | PDT |
| DST Active | No | Yes — currently observing |
| Country | Australia | United States |
| Region | Oceania | North America |
With a 15 hours gap, there is no standard business-hours overlap between Perth and San Francisco. One party will need to adjust their schedule. Early mornings in Perth or late evenings in San Francisco tend to be the most practical compromise.
Use this table to quickly convert any hour from Perth time to San Francisco time. Rows highlighted in green indicate overlapping business hours in both cities.
| Perth | San Francisco | |
|---|---|---|
| 00:00 | 09:00 (-1 day) | Night |
| 01:00 | 10:00 (-1 day) | Night |
| 02:00 | 11:00 (-1 day) | Night |
| 03:00 | 12:00 (-1 day) | Night |
| 04:00 | 13:00 (-1 day) | Night |
| 05:00 | 14:00 (-1 day) | Night |
| 06:00 | 15:00 (-1 day) | |
| 07:00 | 16:00 (-1 day) | |
| 08:00 | 17:00 (-1 day) | |
| 09:00 | 18:00 (-1 day) | |
| 10:00 | 19:00 (-1 day) | |
| 11:00 | 20:00 (-1 day) | |
| 12:00 | 21:00 (-1 day) | |
| 13:00 | 22:00 (-1 day) | |
| 14:00 | 23:00 (-1 day) | |
| 15:00 | 00:00 | |
| 16:00 | 01:00 | |
| 17:00 | 02:00 | |
| 18:00 | 03:00 | |
| 19:00 | 04:00 | |
| 20:00 | 05:00 | |
| 21:00 | 06:00 | |
| 22:00 | 07:00 | Night |
| 23:00 | 08:00 | Night |
San Francisco is currently observing daylight saving time, while Perth is on standard time. When San Francisco switches back to standard time, the difference between these two cities will shift by 1 hour.
The time difference is 15 hours. San Francisco is 15 hours behind Perth.
Yes. One of these cities observes DST while the other does not, so the difference shifts by 1 hour when DST begins or ends.
There is no ideal window during standard business hours. Consider scheduling at the edges — early morning for the city that is ahead and late afternoon for the city that is behind.
Subtract 15 hours from Perth time to get San Francisco time. Use the hour-by-hour table above for a quick reference.
For sunrise and sunset data, visit TheSunsetTimes.com. For detailed DST schedules, see DaylightSavingTime.info.