GMT to BST Converter – Greenwich Mean Time to British Summer Time
BST is 1 hour ahead of GMT. GMT (Greenwich Mean Time) is UTC+0, switching to BST (UTC+1) during daylight saving, while BST (British Summer Time) is UTC+1 all year. The live clocks below show the current time in both zones, updated every second.
GMT to BST Conversion Table (Hour by Hour)
Standard-time conversion from Greenwich Mean Time to British Summer Time. During daylight saving periods the offset shifts by one hour - the live clocks above always show the correct current time.
| GMT (UTC+0) | BST (UTC+1) |
|---|---|
| 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 | 12:00 AM (next day) |
Frequently Asked Questions
What is the time difference between GMT and BST?
BST is 1 hour ahead of GMT. GMT (Greenwich Mean Time) is UTC+0 and BST (British Summer Time) is UTC+1.
How do I convert GMT to BST?
Take your time in GMT and add 1 hours. For example, 9:00 AM GMT is 10:00 AM in BST. The live clocks at the top of this page always show the current conversion.
Does daylight saving time affect GMT to BST conversion?
Yes. GMT switches to BST (UTC+1) in summer, so the gap between the two zones changes during DST periods. The live clocks on this page use the IANA timezone database and always reflect the correct current offset automatically.
What is the best time for a meeting between GMT and BST?
Look for overlap between 9:00 AM-6:00 PM working hours in both zones using the conversion table above. BST is 1 hour ahead of GMT, so there is normally several hours of business-hours overlap.