Convert GMT to BST
See the current GMT to BST time difference, compare hours side by side, and schedule meetings with calendar export tools.
How GMT Converts to BST
GMT is UTC+0, while BST is UTC+1 during British Summer Time, so BST is usually 1 hour ahead. This converter applies the correct offset automatically based on date.
Hour-by-Hour Time Table
Use the visual comparison grid and hour-by-hour table to match GMT hours to BST quickly. Review overlapping work hours and export selected times as ICS or to Google Calendar and Gmail.
Schedule Meetings with Confidence
Plan calls and events between GMT and BST with automatic DST tracking and historical timezone changes. Time calculations are kept accurate using the IANA timezone database.
How to Convert GMT to BST
Open the GMT to BST converter: Go to https://www.xconvert.com/time-converter/gmt-to-bst-converter. The page opens with GMT and BST already set up in the comparison grid, which is useful when you need to line up a London-based schedule with contacts using BST for operations, support coverage, or regional coordination.
Add comparison cities if your workflow spans more than two locations: Click + Add City and search for cities that matter to your schedule, such as London, Dhaka, or Dublin. This is especially helpful for multinational teams handling UK client calls, South Asia service windows, or handoffs between European management and Bangladesh-based operations.
Select the meeting window on the grid: Click Select, then drag across the colored timeline on the GMT row to highlight a time range in purple. For example, if you drag from 9:00 GMT to 12:00 GMT, the BST row shows 15:00 to 18:00 BST, which quickly confirms that a late-morning GMT meeting lands in the afternoon in BST and is often practical for same-day business communication.
Export and share the chosen time block: After selecting a range, use the export options for ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. This is useful when you want to send a confirmed cross-time-zone meeting to a remote team so everyone receives the event in local time without manually rechecking the conversion.
Understanding the GMT to BST Time Difference
GMT is Greenwich Mean Time, UTC+0. BST is Bangladesh Standard Time, UTC+6, so BST is 6 hours ahead of GMT.
That +6 hour gap means a morning time in GMT becomes an afternoon time in BST. The most useful reference points are straightforward: 9:00 GMT = 15:00 BST, 12:00 GMT = 18:00 BST, 15:00 GMT = 21:00 BST, and 18:00 GMT = 0:00 BST (next day). These examples matter for scheduling because they show exactly when a standard business day in GMT begins to push into evening or the next calendar day in BST.
DST can change how people interpret these abbreviations during different parts of the year. GMT is a standard-time abbreviation; its DST counterpart is IST, while BST is a standard-time abbreviation; its DST counterpart is GMT. In practice, the difference changes during the months when daylight saving time is in effect, so users planning seasonal schedules, recurring vendor meetings, or travel-related coordination should confirm whether both sides are currently using their standard-time or DST counterpart.
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. BST is associated with Guernsey, Isle of Man, Jersey, and the United Kingdom, which is relevant if you are scheduling around British administrative, legal, or commercial working hours.
Best Times for Calls and Meetings Between GMT and BST
Because BST is 6 hours ahead of GMT, the most practical overlap usually happens when the GMT side schedules in its late morning or around midday. Using the conversion examples, 9:00 GMT = 15:00 BST and 12:00 GMT = 18:00 BST, so the 9:00 to 12:00 GMT block maps to 15:00 to 18:00 BST, a window that generally fits same-day calls, project reviews, and client updates.
The next example shows where coordination starts becoming less convenient. 15:00 GMT = 21:00 BST, which means a mid-afternoon GMT meeting already lands in the late evening for BST participants; that may still work for urgent escalations, but it is less suitable for routine standups, training sessions, or interviews.
The final example marks the point where the date rolls over in BST. 18:00 GMT = 0:00 BST (next day), so evening work in GMT becomes midnight in BST, which is usually only realistic for emergency support, overnight operations, or tightly timed international deadlines.
For recurring business meetings, a practical approach is to keep the GMT side earlier rather than later. A team that meets at 9:00 GMT reaches BST participants at 15:00, while a meeting at 12:00 GMT reaches them at 18:00; both are far easier to manage than 15:00 GMT, which becomes 21:00 BST.
Frequently Asked Questions
What is the time difference between GMT and BST?
The time difference is +6 hours, with BST ahead of GMT. That means when the clock shows a time in GMT, you add six hours to get BST, such as 9:00 GMT = 15:00 BST and 12:00 GMT = 18:00 BST.
When is 9 AM GMT in BST?
9:00 GMT is 15:00 BST. This is a useful benchmark for business scheduling because a morning GMT call reaches BST participants in the middle of the afternoon, which is often suitable for live meetings, approvals, and status reviews.
When is 12 PM GMT in BST?
12:00 GMT is 18:00 BST. For teams working across both time zones, this means a noon GMT meeting lands at the end of the standard business day in BST, making it workable for short calls but less ideal for long workshops.
When is 3 PM GMT in BST?
15:00 GMT is 21:00 BST. This pushes the BST side into late evening, so it is usually better reserved for urgent discussions, production incidents, or deadlines that cannot be moved earlier in the day.
What happens to 6 PM GMT in BST?
18:00 GMT becomes 0:00 BST on the next day. The date change is important for calendar invites, flight-related coordination, and overnight operations because the BST participant is no longer on the same calendar day as the GMT participant.
Does the difference between GMT and BST change during DST?
Yes, the difference changes when daylight saving time applies because these are standard-time abbreviations and each has a DST counterpart. GMT's DST counterpart is IST, and BST's DST counterpart is GMT, so anyone setting recurring meetings across seasons should verify which abbreviation is currently in use before sending invitations.
What is the best meeting time between GMT and BST?
The most practical window from the examples is 9:00 GMT to 12:00 GMT, which corresponds to 15:00 BST to 18:00 BST. That range keeps the GMT side within the workday while still reaching BST before the schedule moves too far into late evening.
Which countries use GMT and BST?
GMT is used in 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. BST is associated with Guernsey, Isle of Man, Jersey, and the United Kingdom, which is useful context when coordinating calls tied to British legal, financial, or administrative hours.