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 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.
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.
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.
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.
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
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.
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.
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.
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.
British Summer Time to Greenwich Mean Time full day schedule
| British Summer Time | Greenwich Mean Time |
|---|---|
| 12:00 AM |
11:00 PM
(previous day)
|
| 1:00 AM |
12:00 AM
|
| 2:00 AM |
1:00 AM
|
| 3:00 AM |
2:00 AM
|
| 4:00 AM |
3:00 AM
|
| 5:00 AM |
4:00 AM
|
| 6:00 AM |
5:00 AM
|
| 7:00 AM |
6:00 AM
|
| 8:00 AM |
7:00 AM
|
| 9:00 AM |
8:00 AM
|
| 10:00 AM |
9:00 AM
|
| 11:00 AM |
10:00 AM
|
| 12:00 PM |
11:00 AM
|
| 1:00 PM |
12:00 PM
|
| 2:00 PM |
1:00 PM
|
| 3:00 PM |
2:00 PM
|
| 4:00 PM |
3:00 PM
|
| 5:00 PM |
4:00 PM
|
| 6:00 PM |
5:00 PM
|
| 7:00 PM |
6:00 PM
|
| 8:00 PM |
7:00 PM
|
| 9:00 PM |
8:00 PM
|
| 10:00 PM |
9:00 PM
|
| 11:00 PM |
10:00 PM
|
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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.