Sydney to Seattle time conversion
Seattle is 18 hours behind Sydney. After the next clock change (): Seattle is 19 hours behind Sydney.
Time difference with your location
Sydney is 11 hours ahead of UTC. Compare with your local time →
Sydney and Seattle are approximately 12,470 km apart in a straight line.
It is a different calendar day in Sydney (2026-10-22) and Seattle (2026-10-21) now.
Choose a date and time
Choose the local time in Sydney to convert it to Seattle on that date.
Skipped clock-change times are unavailable; a repeated time uses its first occurrence.
24-hour conversion chart · Sydney → Seattle
This table converts each hour in Sydney to Seattle on 2026-10-22.
- Working hours
- Outside working hours
- Night hours
| Sydney | Seattle | Shared working hours |
|---|---|---|
| 00:0012:00 AM | 06:006:00 AM -1 day | |
| 01:001:00 AM | 07:007:00 AM -1 day | |
| 02:002:00 AM | 08:008:00 AM -1 day | |
| 03:003:00 AM | 09:009:00 AM -1 day | |
| 04:004:00 AM | 10:0010:00 AM -1 day | |
| 05:005:00 AM | 11:0011:00 AM -1 day | |
| 06:006:00 AM | 12:0012:00 PM -1 day | |
| 07:007:00 AM | 13:001:00 PM -1 day | |
| 08:008:00 AM | 14:002:00 PM -1 day | ✓ |
| 09:009:00 AM | 15:003:00 PM -1 day | ✓ |
| 10:0010:00 AM | 16:004:00 PM -1 day | ✓ |
| 11:0011:00 AM | 17:005:00 PM -1 day | ✓ |
| 12:0012:00 PM | 18:006:00 PM -1 day | |
| 13:001:00 PM | 19:007:00 PM -1 day | |
| 14:002:00 PM | 20:008:00 PM -1 day | |
| 15:003:00 PM | 21:009:00 PM -1 day | |
| 16:004:00 PM | 22:0010:00 PM -1 day | |
| 17:005:00 PM | 23:0011:00 PM -1 day | |
| 18:006:00 PM | 00:0012:00 AM | |
| 19:007:00 PM | 01:001:00 AM | |
| 20:008:00 PM | 02:002:00 AM | |
| 21:009:00 PM | 03:003:00 AM | |
| 22:0010:00 PM | 04:004:00 AM | |
| 23:0011:00 PM | 05:005:00 AM |
Quick conversion examples
These examples convert local times in Sydney to Seattle on 2026-10-22.
Conversion formula: Seattle = Sydney − 18h · Sydney − 19h · Sydney − 17h.
| Sydney | Seattle |
|---|---|
| 6:00 AM Sydney | = 12:00 PM Seattle (-1 day) |
| 7:00 AM Sydney | = 1:00 PM Seattle (-1 day) |
| 8:00 AM Sydney | = 2:00 PM Seattle (-1 day) |
| 9:00 AM Sydney | = 3:00 PM Seattle (-1 day) |
| 10:00 AM Sydney | = 4:00 PM Seattle (-1 day) |
| 12:00 PM Sydney | = 6:00 PM Seattle (-1 day) |
| 3:00 PM Sydney | = 9:00 PM Seattle (-1 day) |
| 5:00 PM Sydney | = 11:00 PM Seattle (-1 day) |
| 6:00 PM Sydney | = 12:00 AM Seattle |
| 8:00 PM Sydney | = 2:00 AM Seattle |
Overlapping meeting hours
The 08:00–18:00 working day in Sydney and Seattle overlaps for 4 hours on 2026-10-22.
- Shared working hours
- 08:00–12:00 Sydney · 14:00–18:00 Seattle
Clock changes on both sides, 2026–2028
Sydney and Seattle have the following local clock changes in 2026–2028; all times in the table are local to that side.
| Year | Sydney | Seattle |
|---|---|---|
| 2026 | · 03:00 → 02:00 · 02:00 → 03:00 | · 02:00 → 03:00 · 02:00 → 01:00 |
| 2027 | · 03:00 → 02:00 · 02:00 → 03:00 | · 02:00 → 03:00 · 02:00 → 01:00 |
| 2028 | · 03:00 → 02:00 · 02:00 → 03:00 | · 02:00 → 03:00 · 02:00 → 01:00 |
At the start of 2026, Seattle is 19 hours behind Sydney. The difference changes during the following periods.
- From 2026-03-08 21:00 Sydney until 2026-04-05 02:00 Sydney, Seattle is 18 hours behind Sydney.
- From 2026-04-05 02:00 Sydney until 2026-10-04 03:00 Sydney, Seattle is 17 hours behind Sydney.
- From 2026-10-04 03:00 Sydney until 2026-11-01 20:00 Sydney, Seattle is 18 hours behind Sydney.
- From 2027-03-14 21:00 Sydney until 2027-04-04 02:00 Sydney, Seattle is 18 hours behind Sydney.
- From 2027-04-04 02:00 Sydney until 2027-10-03 03:00 Sydney, Seattle is 17 hours behind Sydney.
- From 2027-10-03 03:00 Sydney until 2027-11-07 20:00 Sydney, Seattle is 18 hours behind Sydney.
- From 2028-03-12 21:00 Sydney until 2028-04-02 02:00 Sydney, Seattle is 18 hours behind Sydney.
- From 2028-04-02 02:00 Sydney until 2028-10-01 03:00 Sydney, Seattle is 17 hours behind Sydney.
- From 2028-10-01 03:00 Sydney until 2028-11-05 20:00 Sydney, Seattle is 18 hours behind Sydney.
Frequently asked questions
What time is 9 AM Sydney in Seattle?
9:00 AM Sydney = 3:00 PM Seattle (-1 day), using UTC+11 and UTC-7. Choose a date above for the seasonal local time.
Does the time difference between Sydney and Seattle change during the year?
Yes. During 2026–2028: Seattle is 19 hours behind Sydney; Seattle is 18 hours behind Sydney; Seattle is 17 hours behind Sydney. The clock-change table gives the dates for both sides.
How do I tell whether it is day or night in Seattle?
Read the Seattle clock above: this guide counts 06:00–18:00 local time as daytime and the rest as nighttime, without using sunrise and sunset.
What is the best time to call between Sydney and Seattle?
The shared 08:00–18:00 working window is 08:00–12:00 Sydney / 14:00–18:00 Seattle, a total of 4 hours.
What is the time difference between Sydney and Seattle now?
Right now, Seattle is 18 hours behind Sydney. Conversion formula: Seattle = Sydney − 18h · Sydney − 19h · Sydney − 17h.