BST to EST Time Converter
EST is 5 hours behind BST. BST is UTC+1:00, and The US East Coast is currently on EDT (UTC-4:00).
Best Time to Call Between BST and EST
Both zones are inside normal business hours between 2:00 PM and 5:00 PM BST — that's 9:00 AM to 12:00 PM EST. That's a 3-hour window.
both at work BST only EST only neither — hours along the strip are BST.
Common Times Converted
BST on the left, EST on the right.
BST to EST: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| BST | EST | Working hours |
|---|---|---|
| 12:00 AM | 7:00 PM prev day | — |
| 1:00 AM | 8:00 PM prev day | — |
| 2:00 AM | 9:00 PM prev day | — |
| 3:00 AM | 10:00 PM prev day | — |
| 4:00 AM | 11:00 PM prev day | — |
| 5:00 AM | 12:00 AM | — |
| 6:00 AM | 1:00 AM | — |
| 7:00 AM | 2:00 AM | — |
| 8:00 AM | 3:00 AM | — |
| 9:00 AM | 4:00 AM | BST only |
| 10:00 AM | 5:00 AM | BST only |
| 11:00 AM | 6:00 AM | BST only |
| 12:00 PM | 7:00 AM | BST only |
| 1:00 PM | 8:00 AM | BST only |
| 2:00 PM | 9:00 AM | Both zones |
| 3:00 PM | 10:00 AM | Both zones |
| 4:00 PM | 11:00 AM | Both zones |
| 5:00 PM | 12:00 PM | EST only |
| 6:00 PM | 1:00 PM | EST only |
| 7:00 PM | 2:00 PM | EST only |
| 8:00 PM | 3:00 PM | EST only |
| 9:00 PM | 4:00 PM | EST only |
| 10:00 PM | 5:00 PM | — |
| 11:00 PM | 6:00 PM | — |
What BST and EST Actually Are
BST — British Summer Time
London, Manchester, Birmingham, Glasgow, and the rest of the UK from late March to late October. Standing at UTC+1:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, October 25, 2026, to GMT. BST also stands for Bangladesh Standard Time (UTC+6). BDT is the clearer label for that one.
British Summer Time began in 1916 as a wartime fuel-saving measure and has run every year since, making it one of the oldest continuous daylight saving schemes in the world.
EST — Eastern Standard Time
New York, Toronto, Washington DC, Atlanta, Miami, Boston. Standing at UTC-5:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, November 1, 2026, to EST. Australia also uses EST for its own Eastern Standard Time (UTC+10), now more often written AEST.
Eastern Standard Time is only actually in force from early November to mid-March. For the other eight months the same region is on EDT, which is why so many EST conversions are quietly wrong.
What This Means in Practice
Both sides change clocks, on different dates
Both regions observe daylight saving but do not switch on the same day, so for a week or two each spring and fall the gap between them is an hour different from the rest of the year. Those short windows are where recurring invitations quietly break.
Major Cities in Each Zone
Cities on BST
Cities on EST
Frequently Asked Questions
What is the time difference between BST and EST?
EST is 5 hours behind BST. That is the live figure. Taken strictly as written, the gap between BST and EST is 6 hours — the two differ because at least one of these regions is currently on daylight saving.
What is 9:00 AM BST in EST?
9:00 AM BST is 4:00 AM EST.
What are the best hours to schedule a call between BST and EST?
Between 2:00 PM and 5:00 PM BST, which is 9:00 AM to 12:00 PM EST. Both sides are inside normal business hours through that window.
Does the difference between BST and EST change during the year?
Yes. Both regions observe daylight saving, and they do not switch on the same dates, so the gap shifts by an hour at least twice a year. The next clock change is on Sunday, October 25, 2026.
Does BST always mean British Summer Time?
BST also stands for Bangladesh Standard Time (UTC+6). BDT is the clearer label for that one.
Does EST always mean Eastern Standard Time?
Australia also uses EST for its own Eastern Standard Time (UTC+10), now more often written AEST.