GMT to BST Time Converter
Convert Greenwich Mean Time to British Summer Time instantly.
Scroll the timeline to check any hour of the day.
Search any city, build a custom world clock, and plan across more time zones and options in the FlutterTime app. Free.
How the GMT to BST time difference works
BST is the same time as GMT. Greenwich Mean Time (GMT) is the time zone of the United Kingdom and Ireland.
British Summer Time (BST) is the spring-to-autumn daylight time of the United Kingdom.
For example, 9:00 AM GMT is 9:00 AM BST.
Scroll the timeline above to convert any moment, or use the chart below for a quick reference.
Daylight saving
Both observe
GMT to BST conversion chart
| Greenwich Mean Time (GMT) |
British Summer Time (BST) |
| 12:00 AM |
12:00 AM |
| 1:00 AM |
1:00 AM |
| 2:00 AM |
2:00 AM |
| 3:00 AM |
3:00 AM |
| 4:00 AM |
4:00 AM |
| 5:00 AM |
5:00 AM |
| 6:00 AM |
6:00 AM |
| 7:00 AM |
7:00 AM |
| 8:00 AM |
8:00 AM |
| 9:00 AM |
9:00 AM |
| 10:00 AM |
10:00 AM |
| 11:00 AM |
11:00 AM |
| 12:00 PM |
12:00 PM |
| 1:00 PM |
1:00 PM |
| 2:00 PM |
2:00 PM |
| 3:00 PM |
3:00 PM |
| 4:00 PM |
4:00 PM |
| 5:00 PM |
5:00 PM |
| 6:00 PM |
6:00 PM |
| 7:00 PM |
7:00 PM |
| 8:00 PM |
8:00 PM |
| 9:00 PM |
9:00 PM |
| 10:00 PM |
10:00 PM |
| 11:00 PM |
11:00 PM |
Best time to meet
A standard 9 to 5 workday overlaps from 9:00 AM to 5:00 PM GMT (9:00 AM to 5:00 PM BST). Schedule inside that window to catch both coasts during business hours.
Cities in each time zone
Greenwich Mean Time (GMT)
LondonDublinLisbonEdinburghManchester
British Summer Time (BST)
LondonManchesterBirminghamGlasgowLiverpoolBristol
GMT to BST questions
Is BST ahead of or behind GMT?
BST is the same time as GMT. So 9:00 AM GMT is 9:00 AM BST, and 5:00 PM GMT is 5:00 PM BST.
What time is it in BST when it is 12:00 PM GMT?
When it is 12:00 PM (noon) GMT in Greenwich Mean Time, it is 12:00 PM BST in British Summer Time.
How many hours difference is there between GMT and BST?
GMT and BST are in the same time zone, so there is no time difference.
Do GMT and BST observe daylight saving time?
Both Greenwich Mean Time and British Summer Time observe daylight saving time on the same dates, so they stay in sync all year.
What is the best time to schedule a meeting between GMT and BST?
A standard 9-to-5 workday overlaps from 9:00 AM to 5:00 PM GMT (9:00 AM to 5:00 PM BST). Scheduling inside that window keeps the call during business hours in both Greenwich Mean Time and British Summer Time.
Which cities use GMT and BST?
Greenwich Mean Time (GMT) covers cities such as London, Dublin, Lisbon, Edinburgh, Manchester. British Summer Time (BST) covers cities such as London, Manchester, Birmingham, Glasgow, Liverpool, Bristol.
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