BST to GMT Converter
GMT is 1 hour behind BST. 9:00 AM BST = 8:00 AM GMT.
GMT is 1 hour behind BST. To convert BST to GMT, subtract 1 hour from the BST time: 9:00 AM BST = 8:00 AM GMT.
BST (British Time) is used in United Kingdom from late March to late October. GMT (GMT) is used in Same offset as UTC. The UK and Ireland use GMT in winter; Iceland, Ghana and Senegal all year.
BST here means British Summer Time, not Bangladesh Standard Time. The UK is on GMT only in winter; in summer it uses BST (UTC+1).
BST to GMT time conversion table
BST to GMT on 6 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| BST | GMT | Day |
|---|---|---|
| 12:00 AM BST | 11:00 PM GMT | previous day |
| 1:00 AM BST | 12:00 AM GMT | night |
| 2:00 AM BST | 1:00 AM GMT | night |
| 3:00 AM BST | 2:00 AM GMT | night |
| 4:00 AM BST | 3:00 AM GMT | night |
| 5:00 AM BST | 4:00 AM GMT | night |
| 6:00 AM BST | 5:00 AM GMT | night |
| 7:00 AM BST | 6:00 AM GMT | — |
| 8:00 AM BST | 7:00 AM GMT | — |
| 9:00 AM BST | 8:00 AM GMT | — |
| 10:00 AM BST | 9:00 AM GMT | work hours |
| 11:00 AM BST | 10:00 AM GMT | work hours |
| 12:00 PM BST | 11:00 AM GMT | work hours |
| 1:00 PM BST | 12:00 PM GMT | work hours |
| 2:00 PM BST | 1:00 PM GMT | work hours |
| 3:00 PM BST | 2:00 PM GMT | work hours |
| 4:00 PM BST | 3:00 PM GMT | work hours |
| 5:00 PM BST | 4:00 PM GMT | — |
| 6:00 PM BST | 5:00 PM GMT | — |
| 7:00 PM BST | 6:00 PM GMT | — |
| 8:00 PM BST | 7:00 PM GMT | — |
| 9:00 PM BST | 8:00 PM GMT | — |
| 10:00 PM BST | 9:00 PM GMT | — |
| 11:00 PM BST | 10:00 PM GMT | night |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert BST to GMT
Subtract 1 hour from the BST time to get GMT.
Example: 9:00 AM BST = 8:00 AM GMT.
Across midnight: 12:00 AM BST = 11:00 PM GMT (previous day). The date changes, so always check the day as well as the hour.
Time difference between BST and GMT
The time difference between BST and GMT is 1 hour all year – GMT is behind BST.
BST and GMT during daylight saving time
- BST does not observe daylight saving time; it stays on UTC+1 all year.
- GMT does not observe daylight saving time; it stays on UTC+0 all year.
Best time for a meeting between BST and GMT
BST and GMT share 7 hours of the 9 AM–5 PM working day. Any time between 10:00 AM and 5:00 PM BST lands between 9:00 AM and 4:00 PM GMT, inside working hours for both.
BST to GMT FAQ
What is the time difference between BST and GMT?
GMT is 1 hour behind BST all year. 9:00 AM BST = 8:00 AM GMT.
What is 9 AM BST in GMT?
9:00 AM BST is 8:00 AM GMT.
What is 12 PM (noon) BST in GMT?
12:00 PM BST is 11:00 AM GMT.
Is GMT ahead of or behind BST?
GMT is 1 hour behind BST, so it is earlier in GMT than in BST.
Does BST change for daylight saving time?
No. BST stays on the same offset all year, so conversions never shift for daylight saving time.
Does GMT change for daylight saving time?
No. GMT stays on the same offset all year, so conversions never shift for daylight saving time.
What is the best time for a meeting between BST and GMT?
BST and GMT share 7 hours of the 9 AM–5 PM working day. Any time between 10:00 AM and 5:00 PM BST lands between 9:00 AM and 4:00 PM GMT, inside working hours for both.
Related conversions
Convert GMT to BST
Convert BST to other time zones
Convert other time zones to GMT
Learn more
Updated 6 November 2026. Time zone data: IANA tz database.