Seattle to GMT time conversion
GMT is 7 hours ahead of Seattle. After the next clock change (): GMT is 8 hours ahead of Seattle.
Time difference with your location
Seattle is 7 hours behind UTC. Compare with your local time →
Choose a date and time
Choose the local time in Seattle to convert it to GMT on that date.
Skipped clock-change times are unavailable; a repeated time uses its first occurrence.
24-hour conversion chart · Seattle → GMT
This table converts each hour in Seattle to GMT on 2026-10-21.
- Working hours
- Outside working hours
- Night hours
| Seattle | GMT | Shared working hours |
|---|---|---|
| 00:0012:00 AM | 07:007:00 AM | |
| 01:001:00 AM | 08:008:00 AM | |
| 02:002:00 AM | 09:009:00 AM | |
| 03:003:00 AM | 10:0010:00 AM | |
| 04:004:00 AM | 11:0011:00 AM | |
| 05:005:00 AM | 12:0012:00 PM | |
| 06:006:00 AM | 13:001:00 PM | |
| 07:007:00 AM | 14:002:00 PM | |
| 08:008:00 AM | 15:003:00 PM | ✓ |
| 09:009:00 AM | 16:004:00 PM | ✓ |
| 10:0010:00 AM | 17:005:00 PM | ✓ |
| 11:0011:00 AM | 18:006:00 PM | |
| 12:0012:00 PM | 19:007:00 PM | |
| 13:001:00 PM | 20:008:00 PM | |
| 14:002:00 PM | 21:009:00 PM | |
| 15:003:00 PM | 22:0010:00 PM | |
| 16:004:00 PM | 23:0011:00 PM | |
| 17:005:00 PM | 00:0012:00 AM +1 day | |
| 18:006:00 PM | 01:001:00 AM +1 day | |
| 19:007:00 PM | 02:002:00 AM +1 day | |
| 20:008:00 PM | 03:003:00 AM +1 day | |
| 21:009:00 PM | 04:004:00 AM +1 day | |
| 22:0010:00 PM | 05:005:00 AM +1 day | |
| 23:0011:00 PM | 06:006:00 AM +1 day |
Quick conversion examples
These examples use Seattle (UTC-7) and GMT (UTC+0); choosing a date applies the local clock changes.
Conversion formula: GMT = Seattle + 7h · UTC = Seattle + 8h · UTC = Seattle + 7h.
| Seattle | GMT |
|---|---|
| 6:00 AM Seattle | = 1:00 PM GMT |
| 7:00 AM Seattle | = 2:00 PM GMT |
| 8:00 AM Seattle | = 3:00 PM GMT |
| 9:00 AM Seattle | = 4:00 PM GMT |
| 10:00 AM Seattle | = 5:00 PM GMT |
| 12:00 PM Seattle | = 7:00 PM GMT |
| 3:00 PM Seattle | = 10:00 PM GMT |
| 5:00 PM Seattle | = 12:00 AM GMT (+1 day) |
| 6:00 PM Seattle | = 1:00 AM GMT (+1 day) |
| 8:00 PM Seattle | = 3:00 AM GMT (+1 day) |
Overlapping meeting hours
The 08:00–18:00 working day in Seattle and GMT overlaps for 3 hours on 2026-10-21.
- Shared working hours
- 08:00–11:00 Seattle · 15:00–18:00 GMT
Clock changes on both sides, 2026–2028
Seattle and GMT have the following local clock changes in 2026–2028; all times in the table are local to that side.
| Year | Seattle | GMT |
|---|---|---|
| 2026 | · 02:00 → 03:00 · 02:00 → 01:00 | No clock changes; UTC+0 all year. |
| 2027 | · 02:00 → 03:00 · 02:00 → 01:00 | No clock changes; UTC+0 all year. |
| 2028 | · 02:00 → 03:00 · 02:00 → 01:00 | No clock changes; UTC+0 all year. |
At the start of 2026, UTC is 8 hours ahead of Seattle. The difference changes during the following periods.
- From 2026-03-08 03:00 Seattle until 2026-11-01 01:00 Seattle, UTC is 7 hours ahead of Seattle.
- From 2027-03-14 03:00 Seattle until 2027-11-07 01:00 Seattle, UTC is 7 hours ahead of Seattle.
- From 2028-03-12 03:00 Seattle until 2028-11-05 01:00 Seattle, UTC is 7 hours ahead of Seattle.
Frequently asked questions
What time is 9 AM Seattle in GMT?
9:00 AM Seattle = 4:00 PM GMT, using UTC-7 and UTC+0. Choose a date above for the seasonal local time.
Does the time difference between Seattle and GMT change during the year?
Yes. During 2026–2028: GMT is 7 hours ahead of Seattle; GMT is 8 hours ahead of Seattle. The clock-change table gives the dates for both sides.
How do I tell whether it is day or night in GMT?
Read the UTC 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 Seattle and GMT?
The shared 08:00–18:00 working window is 08:00–11:00 Seattle / 15:00–18:00 UTC, a total of 3 hours.
What is the time difference between Seattle and GMT now?
Right now, UTC is 7 hours ahead of Seattle. Conversion formula: GMT = Seattle + 7h · UTC = Seattle + 8h · UTC = Seattle + 7h.