Convert BST to EST
See the 6-hour time difference from BST to EST, compare hours side by side, and schedule meetings with calendar export tools.
How to Convert BST to EST
Open the BST to EST converter: Go to https://www.xconvert.com/time-converter/bst-to-est-converter. The page loads with BST and EST already set up in the comparison grid, which is useful if you are scheduling a call between London-based teams and colleagues on the US East Coast in industries like finance, media, consulting, or software delivery.
Add other relevant cities if your schedule involves more than two locations: Click + Add City and search for places such as London, New York, and Toronto to compare actual business hubs that use these time standards seasonally, or add Dublin and Boston if your team spans UK-Ireland operations and US clients. This is especially practical for companies coordinating transatlantic sales calls, legal reviews, or support handoffs where UK and eastern North American office hours need to line up.
Drag across the grid to select a meeting window: Click Select if needed, then drag across the BST row to highlight a time range in purple; for example, drag from 9:00 AM to 11:00 AM BST and the EST row will show 4:00 AM to 6:00 AM EST, making it immediately clear that an early UK morning meeting is too early for standard US Eastern business hours. You can drag the center of the selection to move it later, or use the left and right handles to resize it until you find a workable overlap such as 2:00 PM to 5:00 PM BST = 9:00 AM to 12:00 PM EST.
Export and share the selected time: Once the range is selected, use the export options for ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. This is useful when sending a confirmed transatlantic meeting slot to a distributed team, because the calendar export preserves each participant’s local time automatically and reduces mistakes during weeks when UK and US daylight saving rules are not aligned.
Understanding the BST to EST Time Difference
BST usually means British Summer Time (UTC+1), while EST means Eastern Standard Time (UTC-5). When both labels are taken literally, BST is 6 hours ahead of EST, so 9:00 AM BST = 3:00 AM EST and 5:00 PM BST = 11:00 AM EST.
The important complication is that BST is a summer-only UK time, while EST is a standard-only eastern North America time. In real-world scheduling, many people actually mean UK summer time versus US Eastern local time, which becomes EDT (UTC-4) during US daylight saving; in that common scenario, the gap is 5 hours, not 6, so 9:00 AM BST = 4:00 AM EDT and 2:00 PM BST = 9:00 AM EDT.
BST runs in the UK from the last Sunday in March to the last Sunday in October. In 2025, BST starts on 30 March 2025 and ends on 26 October 2025; the US Eastern zone switches to daylight time earlier, from 9 March 2025 to 2 November 2025, which creates mismatch periods when the UK and eastern US are not using their summer schedules on the same dates.
Because of those transition dates, the practical UK-to-US Eastern difference changes by season. From 30 March 2025 to 26 October 2025, BST to EDT is 5 hours; during the shorter mismatch windows of 9 March to 29 March 2025 and 26 October to 2 November 2025, the difference can appear different depending on whether someone is referring to EST specifically or to US Eastern local clock time. This matters for banks, ad agencies, SaaS companies, and customer success teams that regularly book London-New York meetings around quarter-end, product launches, or market open hours.
Best Times for Calls and Meetings Between BST and EST
If you are converting BST to literal EST, the most practical overlap for normal office hours is usually 2:00 PM to 6:00 PM BST = 8:00 AM to 12:00 PM EST. That window works well for transatlantic meetings because UK teams are already into their workday while US East Coast teams are just starting theirs, making it suitable for project check-ins, recruitment interviews, and client presentations.
A narrower but especially comfortable overlap is 3:00 PM to 5:00 PM BST = 9:00 AM to 11:00 AM EST. This is often the best slot for decision-making meetings involving London and cities such as New York, Washington, DC, Atlanta, or Toronto, because it avoids very early starts in North America and keeps UK participants out of late evening hours.
Early BST mornings are usually poor for EST participants. For example, 9:00 AM to 11:00 AM BST = 3:00 AM to 5:00 AM EST, which is not realistic for routine business calls unless you are handling urgent production incidents, overnight trading support, or live event coordination.
Late BST evenings can work for urgent US-facing work but are rarely ideal for recurring meetings. For example, 7:00 PM BST = 1:00 PM EST and 9:00 PM BST = 3:00 PM EST, which may help with legal deadlines, media approvals, or same-day commercial negotiations, but it pushes UK staff beyond standard office hours.
If your actual participants are in the UK on BST and the US East Coast on EDT, not EST, the best overlap shifts earlier by one hour on the US side. In that more common summer setup, 2:00 PM to 5:00 PM BST = 9:00 AM to 12:00 PM EDT, which is why many multinational firms schedule London-New York recurring calls in mid-afternoon UK time during summer months.
Frequently Asked Questions
What is the time difference between BST and EST?
BST is 6 hours ahead of EST when both abbreviations are used strictly: BST = UTC+1 and EST = UTC-5. That means when it is 12:00 PM noon in BST, it is 6:00 AM in EST. This fixed 6-hour difference is correct only when you mean standard EST rather than the broader US Eastern local time that may switch to EDT.
When is 9 AM BST in EST?
9:00 AM BST is 3:00 AM EST. This is a direct 6-hour subtraction, so the US Eastern standard-time location is still in the very early morning while the UK is already starting the business day. For practical scheduling, that usually makes 9 AM BST unsuitable for routine meetings with EST-based participants.
Does the difference between BST and EST change during DST?
If you mean BST and EST literally, the offset remains 6 hours because BST is already a daylight-saving designation and EST is a standard-time designation. However, in real life many users compare BST to US Eastern local time, and that does change because the US often uses EDT (UTC-4) in warmer months, reducing the gap to 5 hours. The exact transition dates differ each year; in 2025, US daylight time starts 9 March and UK BST starts 30 March, then the UK returns to standard time on 26 October while the US stays on daylight time until 2 November.
What is the best meeting time between BST and EST?
For standard office-hour coordination, 3:00 PM to 5:00 PM BST = 9:00 AM to 11:00 AM EST is one of the best recurring windows. It fits comfortably inside a normal workday for both sides and is widely used for transatlantic client calls, internal standups, and commercial reviews. If you need a longer block, 2:00 PM to 6:00 PM BST = 8:00 AM to 12:00 PM EST gives more flexibility without pushing too late into the UK evening.
Why do BST to EST meeting times get confusing in March and October?
The confusion comes from the fact that the UK and US do not change clocks on the same dates. In 2025, the US changes on 9 March and 2 November, while the UK changes on 30 March and 26 October, so there are short periods when one region has shifted and the other has not. During those weeks, teams that casually say “EST” may actually mean “Eastern time,” which can create a one-hour scheduling error if nobody checks the actual date.
Is BST the same as UK time all year?
No. BST is only used during the UK summer period, from the last Sunday in March to the last Sunday in October. Outside that range, the UK uses GMT (UTC+0), so winter conversions from London or other UK cities should usually be checked against GMT to EST rather than BST to EST.
Which cities commonly use BST and EST for business scheduling?
BST is relevant to UK cities such as London, Manchester, Birmingham, Glasgow, and Edinburgh during the summer season. EST is associated with eastern North American locations during standard time, including cities such as New York, Toronto, Ottawa, Detroit, and parts of the Caribbean, although many of these places switch to EDT in summer. This matters for sectors like finance, publishing, broadcasting, e-commerce, and technology support that regularly coordinate work across the Atlantic.
How can I avoid mistakes when converting BST to EST for a calendar invite?
Use the visual grid on the converter page and select the exact date before choosing a time range, because the date determines whether seasonal clock changes are affecting your participants. After dragging the meeting window, export it via ICS, Google Calendar, Gmail, Copy to clipboard, or Share link so everyone receives the event in their own local time. This is especially helpful for recurring London-US meetings scheduled near March or October clock changes, when manual conversion errors are most common.