This simple GMT to BST time zone converter allows you to quickly and visually understand the time difference between GMT (GMT) and BST (BST).
6:39 AM BST
GMT: UTC+00:00 · BST: UTC+01:00
Just hover over the colored hour tiles, and you’ll instantly see the corresponding time in both zones. The time difference between GMT and BST is 1 hours 0 minutes, with BST being ahead. For example, if it is 5:39 AM GMT, the equivalent time in BST will be 6:39 AM BST.
| Greenwich Mean Time | British Summer Time |
|---|---|
| 00:00 GMT | 01:00 BST |
| 00:30 GMT | 01:30 BST |
| 01:00 GMT | 02:00 BST |
| 01:30 GMT | 02:30 BST |
| 02:00 GMT | 03:00 BST |
| 02:30 GMT | 03:30 BST |
| 03:00 GMT | 04:00 BST |
| 03:30 GMT | 04:30 BST |
| 04:00 GMT | 05:00 BST |
| 04:30 GMT | 05:30 BST |
| 05:00 GMT | 06:00 BST |
| 05:30 GMT | 06:30 BST |
| 06:00 GMT | 07:00 BST |
| 06:30 GMT | 07:30 BST |
| 07:00 GMT | 08:00 BST |
| 07:30 GMT | 08:30 BST |
| 08:00 GMT | 09:00 BST |
| 08:30 GMT | 09:30 BST |
| 09:00 GMT | 10:00 BST |
| 09:30 GMT | 10:30 BST |
| 10:00 GMT | 11:00 BST |
| 10:30 GMT | 11:30 BST |
| 11:00 GMT | 12:00 BST |
| 11:30 GMT | 12:30 BST |
| 12:00 GMT | 13:00 BST |
| 12:30 GMT | 13:30 BST |
| 13:00 GMT | 14:00 BST |
| 13:30 GMT | 14:30 BST |
| 14:00 GMT | 15:00 BST |
| 14:30 GMT | 15:30 BST |
| 15:00 GMT | 16:00 BST |
| 15:30 GMT | 16:30 BST |
| 16:00 GMT | 17:00 BST |
| 16:30 GMT | 17:30 BST |
| 17:00 GMT | 18:00 BST |
| 17:30 GMT | 18:30 BST |
| 18:00 GMT | 19:00 BST |
| 18:30 GMT | 19:30 BST |
| 19:00 GMT | 20:00 BST |
| 19:30 GMT | 20:30 BST |
| 20:00 GMT | 21:00 BST |
| 20:30 GMT | 21:30 BST |
| 21:00 GMT | 22:00 BST |
| 21:30 GMT | 22:30 BST |
| 22:00 GMT | 23:00 BST |
| 22:30 GMT | 23:30 BST |
| 23:00 GMT | 00:00 (+1) BST |
| 23:30 GMT | 00:30 (+1) BST |
UTC+00:00
Fixed UTC offset. For seasonal local time, select a city or ET, CT, MT, PT.
GMT · UTC+00:00
UTC+01:00
Fixed UTC offset. For seasonal local time, select a city or ET, CT, MT, PT.
BST · UTC+01:00
2026-10-19 · GMT behind BST: 1 hours 0 minutes. GMT: UTC+00:00; BST: UTC+01:00.
2026-10-19 · 05:39 GMT → 06:39 BST.
Weekday overlap (Mon–Fri, 09:00–17:00 in both places): GMT: 09:00 GMT – 16:00 GMT ↔ BST: 10:00 BST – 17:00 BST
GMT behind BST: 1 hours 0 minutes
Date → Select range → .ics. 2026-10-19 · 05:39 GMT → 06:39 BST.
GMT: Fixed UTC offset. For seasonal local time, select a city or ET, CT, MT, PT. BST: Fixed UTC offset. For seasonal local time, select a city or ET, CT, MT, PT.