BST to GMT Converter – British Summer Time to Greenwich Mean Time
GMT is 1 hour behind BST. BST (British Summer Time) is UTC+1 all year, while GMT (Greenwich Mean Time) is UTC+0, switching to BST (UTC+1) during daylight saving. The live clocks below show the current time in both zones, updated every second.
BST to GMT Conversion Table (Hour by Hour)
Standard-time conversion from British Summer Time to Greenwich Mean Time. During daylight saving periods the offset shifts by one hour - the live clocks above always show the correct current time.
| BST (UTC+1) | GMT (UTC+0) |
|---|---|
| 12:00 AM | 11:00 PM (previous day) |
| 1:00 AM | 12:00 AM |
| 2:00 AM | 1:00 AM |
| 3:00 AM | 2:00 AM |
| 4:00 AM | 3:00 AM |
| 5:00 AM | 4:00 AM |
| 6:00 AM | 5:00 AM |
| 7:00 AM | 6:00 AM |
| 8:00 AM | 7:00 AM |
| 9:00 AM | 8:00 AM |
| 10:00 AM | 9:00 AM |
| 11:00 AM | 10:00 AM |
| 12:00 PM | 11:00 AM |
| 1:00 PM | 12:00 PM |
| 2:00 PM | 1:00 PM |
| 3:00 PM | 2:00 PM |
| 4:00 PM | 3:00 PM |
| 5:00 PM | 4:00 PM |
| 6:00 PM | 5:00 PM |
| 7:00 PM | 6:00 PM |
| 8:00 PM | 7:00 PM |
| 9:00 PM | 8:00 PM |
| 10:00 PM | 9:00 PM |
| 11:00 PM | 10:00 PM |
Frequently Asked Questions
What is the time difference between BST and GMT?
GMT is 1 hour behind BST. BST (British Summer Time) is UTC+1 and GMT (Greenwich Mean Time) is UTC+0.
How do I convert BST to GMT?
Take your time in BST and subtract 1 hours. For example, 9:00 AM BST is 8:00 AM in GMT. The live clocks at the top of this page always show the current conversion.
Does daylight saving time affect BST to GMT 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 BST and GMT?
Look for overlap between 9:00 AM-6:00 PM working hours in both zones using the conversion table above. GMT is 1 hour behind BST, so there is normally several hours of business-hours overlap.