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Time zonesLive · DST-aware

BST to GMT Converter

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

Quick presets

BST to GMT Converter

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

ToolFeather · Intl API

About converting BST to GMT

British Time (London) (London) and Greenwich Mean Time (Greenwich) 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 BST box (or tap a quick preset) and read the GMT 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.

BST vs GMT: the time difference through the year

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

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

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

BST to GMT conversion table

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

Best time to meet

The two zones

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.

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.

Frequently asked questions

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