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BST to GMT Time Converter

Use this BST to GMT time converter to compare United Kingdom and United Kingdom time instantly. GMT is 1 hour behind BST, so 9:00 AM BST becomes 8:00 AM GMT and 5:00 PM BST becomes 4:00 PM GMT. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.

BST British Summer Time
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GMT Greenwich Mean Time
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Select a time to convert

BST to GMT Quick Facts

Use this BST to GMT converter to compare United Kingdom and United Kingdom time, check the 1 hour gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 10:00 AM BST / 9:00 AM GMT.

Time Difference
Greenwich Mean Time is 1 hour behind British Summer Time
Useful when deadlines, handoffs, or calls cross workday boundaries.
Best Call Window
Best overlap starts around 10:00 AM BST and 9:00 AM GMT.
Common Use Cases
Useful for remote teams, customer support windows, travel planning, webinars, and same-day deadline handoffs.

How to Convert BST to GMT

Converting between British Summer Time and Greenwich Mean Time means accounting for a 1 hour gap — here's how to do it in under 10 seconds with no sign-up.

Enter Your BST Time

Pick the date and time in British Summer Time (UTC +1) that you want to convert. Hit "Now" to load the current BST time instantly, or use "+1h" to step forward and compare.

Read the GMT Result

The equivalent Greenwich Mean Time (UTC +0) time appears immediately. Since GMT is 1 hour behind of BST, most daytime conversions stay on the same calendar day.

Copy or Fine-Tune

Click "Copy Time" to grab the GMT result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — useful when Daylight Saving Time changes the gap.

Why Choose Our BST to GMT Converter

Align BST–GMT Meetings Instantly

When someone in United Kingdom suggests 10:00 AM BST, that's 9:00 AM GMT. This converter shows the overlap so both sides agree on one slot — no back-and-forth.

Spot Date-Line Shifts at a Glance

Late-night BST times can land on a different date in GMT because of the 1 hour offset. The converter labels "next day" or "previous day" next to the result so you never send a message a day early or miss a deadline.

Handles DST Transitions Automatically

Daylight Saving adjustments can widen or narrow the BST–GMT gap by an hour. During transition weeks many people get it wrong. This converter pulls the current UTC offsets automatically, so the result is right even on the changeover day.

Never Miss a BST-Timed Event

Product launches, sports matches, and webinars are often announced in BST. Convert the event time to GMT so you know exactly when to tune in — with a 1 hour difference, a morning event in United Kingdom falls during work hours in Universal.

BST to GMT Time Conversion Chart

Quick-reference conversion table covering every hour of the day at a glance.

Complete 24-Hour Conversion

British Summer Time to Greenwich Mean Time full day schedule

12:00 AM
BST
→
11:00 PM
GMT
(previous day)
1:00 AM
BST
→
12:00 AM
GMT
2:00 AM
BST
→
1:00 AM
GMT
3:00 AM
BST
→
2:00 AM
GMT
4:00 AM
BST
→
3:00 AM
GMT
5:00 AM
BST
→
4:00 AM
GMT
6:00 AM
BST
→
5:00 AM
GMT
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
11:00 AM
BST
→
10:00 AM
GMT
12:00 PM
BST
→
11:00 AM
GMT
1:00 PM
BST
→
12:00 PM
GMT
2:00 PM
BST
→
1:00 PM
GMT
3:00 PM
BST
→
2:00 PM
GMT
4:00 PM
BST
→
3:00 PM
GMT
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
The two zones in context

BST vs GMT — cities and working rhythm

BST — British Summer Time
Primary cities: London, Dublin, Edinburgh (summer only)

UK / Ireland summer offset (last Sunday of March to last Sunday of October) — UTC+1, same as CET. During BST, London aligns with continental European working hours rather than the standard 1-hour gap. Winter reverts to GMT (UTC+0).

GMT — Greenwich Mean Time
Primary cities: London, Dublin, Lisbon, Accra, Reykjavík

UK / Ireland / Iceland / Portugal / West Africa. Business hours 9 AM – 5:30 PM GMT typically. Note: London is on GMT in winter, BST (GMT+1) in summer — but "GMT" gets used loosely all year in scheduling contexts. Financial-services London anchors the European trading day.

Time gap: GMT is 1.0 hours behind BST (standard-time offsets — daylight-saving flips shift this by an hour twice a year in most northern-hemisphere zones).

Popular BST Time Converters

Explore more BST conversions for major business and travel corridors. Each page includes a 24-hour chart, time difference summary, and meeting overlap guidance.

Convert Other Time Zones to GMT

Find the time difference from any major zone into Greenwich Mean Time. Use these pages when scheduling with Universal from a different region.

🌍 Swap direction — GMT to BST Converter