Time difference
Perth to San Francisco Time Difference
San Francisco is 15 hours behind Perth — when it's 12:00 PM in Perth, it's 9:00 PM the previous day in San Francisco. (Perth (Australia/Perth, AWST); San Francisco (America/Los_Angeles, PDT).) Below: live local times, the best hours for a call, a full conversion table, and exact daylight-saving dates.
San Francisco is 15 hours behind Perth. Standard 9 AM–5 PM business hours in Perth and San Francisco do not overlap, so a live call needs one side outside normal hours. Clocks change on November 1, 2026, which briefly shifts the gap between Perth and San Francisco — the converter on this page always reflects the correct offset for the date you pick.
- When it's 9:00 AM in Perth, it's 6:00 PM the previous day in San Francisco.
- When it's 9:00 AM in San Francisco, it's 12:00 AM the next day in Perth.
San Francisco is currently 15 hours behind Perth.
Interactive converter
12:00PM
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Best times to meet
Standard 9 AM – 5 PM hours in Perth and San Francisco do not overlap. The least-bad options are an early start in one city or a late evening call in the other — for example a 7–8 AM meeting in Perth, or a 6–8 PM meeting in San Francisco.
Quick conversion table
| Perth | San Francisco |
|---|---|
| 12 AM | 9:00 AM (prev day) |
| 1 AM | 10:00 AM (prev day) |
| 2 AM | 11:00 AM (prev day) |
| 3 AM | 12:00 PM (prev day) |
| 4 AM | 1:00 PM (prev day) |
| 5 AM | 2:00 PM (prev day) |
| 6 AM | 3:00 PM (prev day) |
| 7 AM | 4:00 PM (prev day) |
| 8 AM | 5:00 PM (prev day) |
| 9 AM | 6:00 PM (prev day) |
| 10 AM | 7:00 PM (prev day) |
| 11 AM | 8:00 PM (prev day) |
| 12 PM | 9:00 PM (prev day) |
| 1 PM | 10:00 PM (prev day) |
| 2 PM | 11:00 PM (prev day) |
| 3 PM | 12:00 AM |
| 4 PM | 1:00 AM |
| 5 PM | 2:00 AM |
| 6 PM | 3:00 AM |
| 7 PM | 4:00 AM |
| 8 PM | 5:00 AM |
| 9 PM | 6:00 AM |
| 10 PM | 7:00 AM |
| 11 PM | 8:00 AM |
Daylight saving
On November 1, 2026, San Francisco shifts for daylight saving. After that, San Francisco will be 16 hours behind Perth (currently 15 hours behind Perth). The converter and the tables above always reflect the correct offset for the date you pick.
- Perth does not observe daylight saving time.
- San Francisco is currently observing daylight saving time.
Frequently asked questions
- Is San Francisco ahead of or behind Perth?
- San Francisco is 15 hours behind Perth.
- How many hours behind Perth is San Francisco?
- San Francisco is 15 hours behind Perth.
- What time is 9 AM in Perth in San Francisco?
- 9:00 AM in Perth is 6:00 PM the previous day in San Francisco.
- What time is noon in Perth in San Francisco?
- 12:00 PM in Perth is 9:00 PM the previous day in San Francisco.
- What time is 5 PM in Perth in San Francisco?
- 5:00 PM in Perth is 2:00 AM in San Francisco. Useful for end-of-day handoffs between the two offices.
- What time is 3 PM in Perth in San Francisco?
- 3:00 PM in Perth is 12:00 AM in San Francisco.
- Is Perth currently observing daylight saving time?
- Perth does not observe daylight saving time — its UTC offset stays the same all year.
- Is San Francisco currently observing daylight saving time?
- San Francisco is currently observing daylight saving time (summer time).
- Do Perth and San Francisco observe daylight saving?
- On November 1, 2026, San Francisco shifts for daylight saving. After that, San Francisco will be 16 hours behind Perth (currently 15 hours behind Perth). The converter and the tables above always reflect the correct offset for the date you pick.
- When is the best time to call San Francisco from Perth?
- Perth and San Francisco business hours don't overlap. The closest options are early mornings in Perth or late evenings, when one side stretches outside 9–5.
- When is the best time to call Perth from San Francisco?
- San Francisco and Perth business hours don't overlap. The closest options are early mornings in San Francisco or late evenings, when one side stretches outside 9–5.
- Perth (AWST) to San Francisco (PDT) — how do I convert quickly?
- Subtract 15 hours from Perth local time to get San Francisco local time. Or use the converter at the top of this page — it stays accurate through daylight-saving changes automatically.
Other conversions
- New York to Perth
- London to Perth
- Perth to Tokyo
- Dubai to Perth
- Perth to Singapore
- Los Angeles to Perth
- Perth to Sydney
- Paris to Perth
- Mumbai to Perth
- Hong Kong to Perth