BST to GMT Time Converter

Greenwich Mean Time (GMT) is currently 1 hour behind British Summer Time (BST). BST is UTC+1 and GMT is UTC+0. The table below converts every hour of the day between the two, and the call planner shows where working hours line up.

British Summer Time (BST)

--:--:--

(UTC+1)

Greenwich Mean Time (GMT)

--:--:--

(UTC+0)

Best Time for a Call

Both sides are inside 9:00 AM to 5:00 PM office hours between 10:00 AM and 5:00 PM in BST, which is 9:00 AM to 4:00 PM in GMT.

Comparing more than two places? The Overlap Zones tool shows working hours for several cities on one grid.

Hour by Hour: BST to GMT

BSTGMT

12:00 AM11:00 PM-1 day

1:00 AM12:00 AM

2:00 AM1:00 AM

3:00 AM2:00 AM

4:00 AM3:00 AM

5:00 AM4:00 AM

6:00 AM5:00 AM

7:00 AM6:00 AM

8:00 AM7:00 AM

9:00 AM8:00 AM

10:00 AM9:00 AMoffice hours

11:00 AM10:00 AMoffice hours

12:00 PM11:00 AMoffice hours

1:00 PM12:00 PMoffice hours

2:00 PM1:00 PMoffice hours

3:00 PM2:00 PMoffice hours

4:00 PM3:00 PMoffice hours

5:00 PM4:00 PMoffice hours

6:00 PM5:00 PM

7:00 PM6:00 PM

8:00 PM7:00 PM

9:00 PM8:00 PM

10:00 PM9:00 PM

11:00 PM10:00 PM

Rows marked office hours fall between 9:00 AM and 5:00 PM in both places. For a specific date, use the interactive converter.

Does the Difference Change During the Year?

BST and GMT are fixed offsets, so the difference between them never changes.

BST is UTC+1, used in the UK from late March to late October. In winter the UK is on GMT. BST can also refer to Bangladesh Standard Time, which is UTC+6.

GMT is UTC+0 and never shifts. The UK is on GMT in winter but moves to BST (UTC+1) from late March to late October.

Frequently Asked Questions

How many hours behind is GMT compared to BST?

GMT is currently 1 hour behind BST. BST and GMT are fixed offsets, so the difference between them never changes.

What time is 9:00 AM in BST in GMT?

9:00 AM in BST is 8:00 AM in GMT.

What is the best time for a call between BST and GMT?