TimezoneToolbox

BST to GMT converter

GMT is usually 1 h behind BST. It is the same time as BST 1 Jan–29 Mar and 25 Oct–31 Dec 2026, because of daylight saving time.

Loading converter…

BST to GMT table

For 12 July 2026, when GMT is 1 h behind BST. Other dates: see the table on the right.

BSTGMT24-hour
12:00 AM11:00 PM prev. day0:00 → 23:00
1:00 AM12:00 AM 1:00 → 0:00
2:00 AM1:00 AM 2:00 → 1:00
3:00 AM2:00 AM 3:00 → 2:00
4:00 AM3:00 AM 4:00 → 3:00
5:00 AM4:00 AM 5:00 → 4:00
6:00 AM5:00 AM 6:00 → 5:00
7:00 AM6:00 AM 7:00 → 6:00
8:00 AM7:00 AM 8:00 → 7:00
9:00 AM8:00 AM 9:00 → 8:00
10:00 AM9:00 AM 10:00 → 9:00
11:00 AM10:00 AM 11:00 → 10:00
12:00 PM11:00 AM 12:00 → 11:00
1:00 PM12:00 PM 13:00 → 12:00
2:00 PM1:00 PM 14:00 → 13:00
3:00 PM2:00 PM 15:00 → 14:00
4:00 PM3:00 PM 16:00 → 15:00
5:00 PM4:00 PM 17:00 → 16:00
6:00 PM5:00 PM 18:00 → 17:00
7:00 PM6:00 PM 19:00 → 18:00
8:00 PM7:00 PM 20:00 → 19:00
9:00 PM8:00 PM 21:00 → 20:00
10:00 PM9:00 PM 22:00 → 21:00
11:00 PM10:00 PM 23:00 → 22:00

When the difference changes

Computed from the IANA tz database (release 2026c). Governments can change these rules; the live converter uses your browser’s own copy of the database.

2026: from (UTC)until (UTC)GMT vs BST
1 January 202629 March 2026the same time as
29 March 202625 October 20261 h behind
25 October 202631 December 2026the same time as
2027: from (UTC)until (UTC)GMT vs BST
1 January 202728 March 2027the same time as
28 March 202731 October 20271 h behind
31 October 202731 December 2027the same time as

BST: British Summer Time · BST time now
BST only exists from late March to late October. The rest of the year the UK is on GMT. This page follows the London clock either way.

GMT: Greenwich Mean Time · GMT time now
GMT here means the fixed UTC+0 offset. The UK only uses GMT in winter; in summer London is on BST (UTC+1).

Related converters

Questions

What is the time difference between BST and GMT?

GMT is usually 1 h behind BST. It is the same time as BST 1 Jan–29 Mar and 25 Oct–31 Dec 2026, because of daylight saving time.

What is 9 am BST in GMT?

9:00 am BST is 8:00 AM GMT, on dates when the usual difference applies. Use the converter above for any specific date.

Which BST does this page use?

BST only exists from late March to late October. The rest of the year the UK is on GMT. This page follows the London clock either way.

Which GMT does this page use?

GMT here means the fixed UTC+0 offset. The UK only uses GMT in winter; in summer London is on BST (UTC+1).