EST to GMT Time Converter
GMT is 5 hours ahead of EST. The US East Coast is currently on EDT (UTC-4:00), and The UK and Ireland are currently on BST (UTC+1:00).
Best Time to Call Between EST and GMT
Both zones are inside normal business hours between 9:00 AM and 12:00 PM EST — that's 2:00 PM to 5:00 PM GMT. That's a 3-hour window.
both at work EST only GMT only neither — hours along the strip are EST.
Common Times Converted
EST on the left, GMT on the right.
EST to GMT: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| EST | GMT | Working hours |
|---|---|---|
| 12:00 AM | 5:00 AM | — |
| 1:00 AM | 6:00 AM | — |
| 2:00 AM | 7:00 AM | — |
| 3:00 AM | 8:00 AM | — |
| 4:00 AM | 9:00 AM | GMT only |
| 5:00 AM | 10:00 AM | GMT only |
| 6:00 AM | 11:00 AM | GMT only |
| 7:00 AM | 12:00 PM | GMT only |
| 8:00 AM | 1:00 PM | GMT only |
| 9:00 AM | 2:00 PM | Both zones |
| 10:00 AM | 3:00 PM | Both zones |
| 11:00 AM | 4:00 PM | Both zones |
| 12:00 PM | 5:00 PM | EST only |
| 1:00 PM | 6:00 PM | EST only |
| 2:00 PM | 7:00 PM | EST only |
| 3:00 PM | 8:00 PM | EST only |
| 4:00 PM | 9:00 PM | EST only |
| 5:00 PM | 10:00 PM | — |
| 6:00 PM | 11:00 PM | — |
| 7:00 PM | 12:00 AM next day | — |
| 8:00 PM | 1:00 AM next day | — |
| 9:00 PM | 2:00 AM next day | — |
| 10:00 PM | 3:00 AM next day | — |
| 11:00 PM | 4:00 AM next day | — |
What EST and GMT Actually Are
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.
GMT — Greenwich Mean Time
The UK and Ireland in winter, plus Iceland, Portugal and much of West Africa. Standing at UTC 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. Often used loosely as a synonym for UTC. They differ by less than a second, so for scheduling they are interchangeable.
Britain ran an experiment from 1968 to 1971 on permanent UTC+1, abandoning GMT entirely. It was scrapped after complaints about dark winter mornings in Scotland.
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 EST
Cities on GMT
Frequently Asked Questions
What is the time difference between EST and GMT?
GMT is 5 hours ahead of EST.
What is 9:00 AM EST in GMT?
9:00 AM EST is 2:00 PM GMT.
What are the best hours to schedule a call between EST and GMT?
Between 9:00 AM and 12:00 PM EST, which is 2:00 PM to 5:00 PM GMT. Both sides are inside normal business hours through that window.
Does the difference between EST and GMT 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, November 1, 2026.
Does EST always mean Eastern Standard Time?
Australia also uses EST for its own Eastern Standard Time (UTC+10), now more often written AEST.
Does GMT always mean Greenwich Mean Time?
Often used loosely as a synonym for UTC. They differ by less than a second, so for scheduling they are interchangeable.