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Time zonesLive · DST-aware

GMT to BST Converter

See the current time in GMT (Greenwich) and BST (London) side by side, the exact time difference right now, and convert any time between the two zones.

Quick presets

GMT to BST Converter

GMT
Greenwich
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BST
London
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Uses your browser's built-in, DST-aware time-zone data.

ToolFeather · Intl API

About converting GMT to BST

Greenwich Mean Time (Greenwich) and British Time (London) (London) are in different time zones, so a meeting, call or stream that's convenient in one may be early or late in the other. The clocks above update live and account for daylight saving automatically, so the time difference you see is the real one for today — not a fixed number that goes stale twice a year.

To plan across the two, type a time into the GMT box (or tap a quick preset) and read the BST equivalent, including a "next day" or "previous day" note when the conversion crosses midnight. For any other pair of zones or cities, use the full timezone converter.

GMT vs BST: the time difference through the year

The gap between GMT and BST changes during the year because only one of them uses daylight saving.

PeriodDifference
Oct 23, 2026 – Oct 24, 2026BST 1 h ahead of GMT
Oct 25, 2026 – Mar 27, 2027BST same time
Mar 28, 2027 – Oct 23, 2027BST 1 h ahead of GMT

Daylight-saving changes in the next year

ZoneDateOffsetChange
BSTOct 25, 2026UTC+1 → UTC+0Clocks go back 1 hour
BSTMar 28, 2027UTC+0 → UTC+1Clocks go forward 1 hour
BSTOct 31, 2027UTC+1 → UTC+0Clocks go back 1 hour

GMT to BST conversion table

GMTBST (when 1 h ahead)BST (when same time)
12:00 AM1:00 AM12:00 AM
1:00 AM2:00 AM1:00 AM
2:00 AM3:00 AM2:00 AM
3:00 AM4:00 AM3:00 AM
4:00 AM5:00 AM4:00 AM
5:00 AM6:00 AM5:00 AM
6:00 AM7:00 AM6:00 AM
7:00 AM8:00 AM7:00 AM
8:00 AM9:00 AM8:00 AM
9:00 AM10:00 AM9:00 AM
10:00 AM11:00 AM10:00 AM
11:00 AM12:00 PM11:00 AM
12:00 PM1:00 PM12:00 PM
1:00 PM2:00 PM1:00 PM
2:00 PM3:00 PM2:00 PM
3:00 PM4:00 PM3:00 PM
4:00 PM5:00 PM4:00 PM
5:00 PM6:00 PM5:00 PM
6:00 PM7:00 PM6:00 PM
7:00 PM8:00 PM7:00 PM
8:00 PM9:00 PM8:00 PM
9:00 PM10:00 PM9:00 PM
10:00 PM11:00 PM10:00 PM
11:00 PM12:00 AM (next day)11:00 PM

Best time to meet

The two zones

GMT · Greenwich Mean Time

Greenwich Mean Time is UTC+0 all year. It is the base for world time; the UK uses GMT only in winter and switches to BST in summer.

BST · British Time (London)

UK time is GMT (UTC+0) in winter and British Summer Time (BST, UTC+1) from the last Sunday in March to the last Sunday in October. Ireland and Portugal follow the same switch dates.

Frequently asked questions

6 answers
What is the time difference between GMT and BST?
It's shown live at the top of this page (and it can change with daylight saving). The converter uses the current, DST-aware difference between Greenwich Mean Time and British Time (London), so the time you see is always right for right now.
How do I convert GMT to BST?
Enter a time in the GMT box and the equivalent BST time appears instantly, adjusted for the current offset between the two zones — including a note if it lands on the previous or next day.
Is this GMT to BST converter accurate with daylight saving?
Yes. It uses your browser's built-in time-zone database (the IANA zones behind Greenwich and London), which tracks daylight-saving changes automatically, so the current times and difference are correct.
What time is it in London right now?
The live clock above shows the current time in London (BST), updating every second, alongside GMT.
Does the GMT to BST time difference change?
Yes. Over the next 12 months it is 1 h ahead or same time, depending on the date — see the table of periods on this page.
What is a good meeting time for GMT and BST?
Office hours overlap from 9:00 AM to 4:00 PM GMT (10:00 AM to 5:00 PM BST).