Convert GMT to BST
See the time difference between Greenwich Mean Time and British Summer Time, compare hours side by side, and schedule meetings fast.
How GMT to BST Works
Convert Greenwich Mean Time (UTC+0) to British Summer Time (UTC+1) using the current UK daylight saving rule. The converter adjusts automatically when BST starts or ends.
Hour-by-Hour Time Table
Use the visual hour-by-hour table to compare GMT and BST across the day. Scan matching times quickly and export selections with ICS download or Google Calendar and Gmail support.
Schedule Meetings Accurately
Find the best meeting times between GMT and BST with side-by-side scheduling tools and calendar export options. DST changes and historical timezone rules are tracked using the IANA timezone database.
How to Convert GMT to BST
Looking for Bangladesh Standard Time? See /time-converter/bst-bangladesh-time-zone.
Looking for Bougainville Standard Time? See /time-converter/bst-bougainville-time-zone.
Open the GMT to BST converter: Go to
https://www.xconvert.com/time-converter/gmt-to-bst-converterto compare GMT (Greenwich Mean Time, UTC+0) with BST (British Summer Time, UTC+1) on a visual timeline. This page is useful when you need to schedule a call with colleagues in the United Kingdom during summer time, or when you want to confirm whether a GMT-based deadline lands an hour later in British Summer Time.Add comparison rows for related locations: Click + Add City and add places that commonly work with Greenwich Mean Time or British Summer Time, such as London, Dublin, or Accra, depending on whether you are coordinating UK operations, media schedules, or cross-border support coverage. This makes it easier to compare one-hour seasonal shifts across teams in the United Kingdom and other GMT-using countries including Ghana, Iceland, and Senegal.
Drag to select the meeting window: Use the Select button if needed, then drag across the grid to highlight a time range in purple and compare GMT against British Summer Time visually. For example, selecting 9:00 GMT to 12:00 GMT shows 10:00 BST to 13:00 BST, which is a practical window for UK business calls, project handoffs, and customer support coordination because BST is 1 hour ahead of GMT.
Export and share the selected time: After selecting a range, use the export options for ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. This is useful when a distributed team needs the same meeting block saved in local calendars automatically, or when you want to send a confirmed UK summer-time slot to clients, recruiters, or operations teams without rewriting the conversion manually.
Understanding the GMT to BST Time Difference
GMT (Greenwich Mean Time, UTC+0) and BST (British Summer Time, UTC+1) differ by exactly 1 hour. British Summer Time is 1 hour ahead of GMT, which means GMT is 1 hour behind BST. In practical terms, 9:00 GMT = 10:00 BST, 12:00 GMT = 13:00 BST, 15:00 GMT = 16:00 BST, and 18:00 GMT = 19:00 BST.
British Summer Time is the daylight saving time abbreviation used in the United Kingdom, while GMT is the standard-time abbreviation. That means the relationship between these two labels matters most during the part of the year when the UK is observing British Summer Time rather than standard time. When someone says a meeting is in British Summer Time, it should be read as one hour later than the same clock time in GMT.
This distinction matters for scheduling across the countries that use GMT year-round or reference it operationally, including Ghana, Iceland, Senegal, Sierra Leone, Liberia, and the United Kingdom in standard time. It also matters inside the British Isles because British Summer Time applies in the United Kingdom, Guernsey, Jersey, and the Isle of Man, so a GMT timestamp and a British Summer Time timestamp are not interchangeable during the summer-time period.
Best Times for Calls and Meetings Between GMT and BST
British Summer Time (British Summer Time, UTC+1) stays closely aligned with GMT because the gap is only 1 hour, so there is broad overlap for normal business communication. A morning slot in GMT remains a morning-to-early-afternoon slot in British Summer Time, which is convenient for internal UK scheduling, European coordination, and media, finance, logistics, and customer service teams that work across both labels.
A practical overlap window is 9:00 GMT to 15:00 GMT, which corresponds to 10:00 BST to 16:00 BST using the examples on this page. That range is especially useful for project check-ins, agency-client calls, newsroom coordination, and retail operations planning because it avoids very early starts while still leaving time for follow-up work on the same business day.
Later-day scheduling is also straightforward, but the one-hour shift should still be confirmed before sending invites. For example, 18:00 GMT = 19:00 BST, which can work for after-hours updates, event coordination, or travel-related communication, but it may be less suitable for routine team meetings than the earlier examples of 9:00 GMT = 10:00 BST or 12:00 GMT = 13:00 BST.
Frequently Asked Questions
What is the time difference between GMT and BST?
BST (British Summer Time, UTC+1) is 1 hour ahead of GMT (Greenwich Mean Time, UTC+0). Put another way, GMT is 1 hour behind British Summer Time, so every GMT time converts by adding one hour to get BST.
When is 9 AM GMT in BST?
9:00 GMT = 10:00 BST. This is one of the most common conversions for work scheduling because a 9 AM GMT start becomes a 10 AM British Summer Time meeting, which fits comfortably into a standard UK business morning.
Does the difference between GMT and BST change during DST?
Yes, the difference exists because British Summer Time is the DST abbreviation and GMT is the standard-time abbreviation. When British Summer Time is in use, BST is 1 hour ahead of GMT; this seasonal shift is exactly why users often need a dedicated GMT to BST converter instead of treating the two abbreviations as identical.
What is the best meeting time between GMT and BST?
Because the gap is only 1 hour, most daytime hours overlap well for meetings. A strong option is the range shown by the examples on this page: 9:00 GMT to 15:00 GMT maps to 10:00 BST to 16:00 BST, which is suitable for business calls, team standups, training sessions, and client reviews.
When is 12 PM GMT in BST?
12:00 GMT = 13:00 BST. This is a useful conversion for lunch-hour scheduling, webinar start times, and midday deadlines, especially when one team writes times in GMT and another works in British Summer Time.
Is BST British Summer Time or Bangladesh Standard Time?
On this page, BST means British Summer Time (UTC+1). BST can also mean Bangladesh Standard Time (UTC+6), which is a different time zone entirely; for that meaning, use /time-converter/bst-bangladesh-time-zone. BST can also refer to Bougainville Standard Time on a separate page.
Which countries use GMT and which countries use British Summer Time?
GMT is used across a wide set of countries and territories including Burkina Faso, Gambia, Ghana, Guernsey, Guinea, Guinea-Bissau, Iceland, Ireland, Isle of Man, Ivory Coast, Jersey, Liberia, Mali, Mauritania, Saint Helena, Sao Tome and Principe, Senegal, Sierra Leone, Togo, and the United Kingdom. British Summer Time is used in Guernsey, Isle of Man, Jersey, and the United Kingdom, which is why the GMT-to-BST conversion is especially relevant for UK summer scheduling.
When is 3 PM GMT in BST?
15:00 GMT = 16:00 BST. This is a common afternoon conversion for status calls, publishing schedules, and same-day approvals, since a mid-afternoon GMT slot becomes a late-afternoon British Summer Time appointment.
When is 6 PM GMT in BST?
18:00 GMT = 19:00 BST. That one-hour shift is important for evening events, broadcast timing, and travel coordination, because a time that still looks like late afternoon in GMT is already early evening in British Summer Time.