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Convert ET to GMT

Eastern Time (ET) to Greenwich Mean Time (GMT)

Financial firms on Wall Street, consultancies with London offices, and transatlantic sales teams search this daily. New York and London are the world's two largest financial centers, making this one of the highest-volume time zone conversions globally.

When it's 12:00 PM ET, it's 4:00 PM GMT

UTC-4 UTC±0 +4 hours

Interactive Converter

Pick any time and date to convert between ET and GMT.

ET to GMT Conversion Table

Full 24-hour comparison. Business hours (9 AM -- 6 PM) are highlighted.

ET GMT
12:00 AM 4:00 AM
1:00 AM 5:00 AM
2:00 AM 6:00 AM
3:00 AM 7:00 AM
4:00 AM 8:00 AM
5:00 AM 9:00 AM
6:00 AM 10:00 AM
7:00 AM 11:00 AM
8:00 AM 12:00 PM
9:00 AM 1:00 PM
10:00 AM 2:00 PM
11:00 AM 3:00 PM
12:00 PM 4:00 PM
1:00 PM 5:00 PM
2:00 PM 6:00 PM
3:00 PM 7:00 PM
4:00 PM 8:00 PM
5:00 PM 9:00 PM
6:00 PM 10:00 PM
7:00 PM 11:00 PM
8:00 PM 12:00 AM +1 day
9:00 PM 1:00 AM +1 day
10:00 PM 2:00 AM +1 day
11:00 PM 3:00 AM +1 day

Best Meeting Window

Top meeting times for teams in ET and GMT (9 AM -- 6 PM work hours, 1-hour meeting).

12a
3a
6a
9a
12p
3p
6p
9p
ET EDT
GMT GMT
Overlap
Everyone available
Most available
Some overlap
Outside work hours
1 11:00 AM -- 12:00 PM ET
ET: 11:00 AM GMT: 3:00 PM

All members within working hours. Everyone in mid-day range. Note: 1 timezone(s) have a DST transition within 14 days.

8.1 / 10
2 12:00 PM -- 1:00 PM ET
ET: 12:00 PM GMT: 4:00 PM

All members within working hours. Everyone in mid-day range. Note: 1 timezone(s) have a DST transition within 14 days.

8.1 / 10
3 10:00 AM -- 11:00 AM ET
ET: 10:00 AM GMT: 2:00 PM

All members within working hours. Everyone in mid-day range. Note: 1 timezone(s) have a DST transition within 14 days.

7.9 / 10

Try the Meeting Planner with custom work hours →

Scheduling Tips

  • The prime overlap is 9:00 AM-12:00 PM EST / 2:00-5:00 PM GMT. Both teams are in core working hours.
  • Mark the March and October DST gap weeks on your calendar — recurring meetings shift by 1 hour during those windows.
  • For critical transatlantic deals, send calendar invites with both time zones explicitly noted to avoid confusion during DST transitions.

Time Difference & DST

GMT is 4 hours ahead of ET. ET is at UTC-4 and GMT is at UTC±0.

Upcoming DST Transitions:

ET Clocks fall back on November 2, 2026
GMT Clocks spring forward on March 30, 2026

The conversion table above reflects the current DST state at build time. Use the interactive converter for live, date-specific conversions.

Major Cities

Eastern Time (ET)

  • New York
  • Miami
  • Atlanta

Greenwich Mean Time (GMT)

  • London
  • Manchester
  • Birmingham

Frequently Asked Questions

What is the time difference between EST and GMT?
EST (Eastern Standard Time, UTC-5) is 5 hours behind GMT (UTC+0). When it is 9:00 AM in New York, it is 2:00 PM in London. During daylight saving time, EDT (UTC-4) narrows the gap to 4 hours when only the US has changed, or back to 5 hours once the UK also moves to BST.
When does the EST-GMT offset change?
The US springs forward (to EDT) on the second Sunday in March, while the UK springs forward (to BST) on the last Sunday in March. During those 2–3 weeks, the gap is 4 hours instead of 5. In fall, the UK reverts on the last Sunday of October and the US on the first Sunday of November — the gap is 4 hours for about 1 week. For exact dates each year, see DST Explained.
What is 9 AM EST in GMT?
9:00 AM EST is 2:00 PM GMT. This is mid-afternoon in London, making it one of the most popular transatlantic meeting slots.
What is 12 PM EST in GMT?
12:00 PM (noon) EST is 5:00 PM GMT. London is wrapping up for the day, so this is the latest practical slot for UK colleagues.
What is 5 PM GMT in EST?
5:00 PM GMT is 12:00 PM (noon) EST. The UK workday ends as the US East Coast hits lunchtime. Plan handoffs around this crossover.
Is GMT the same as UTC?
For practical scheduling purposes, GMT and UTC are the same offset (UTC+0). However, GMT refers to the UK civil time zone (Europe/London), which switches to BST (UTC+1) in summer. UTC is a fixed reference that never changes.
What are the DST gap weeks between New York and London?
In spring, there are roughly 2-3 weeks (mid-March to late March) where the US has already moved to EDT but the UK is still on GMT, shrinking the gap to 4 hours. In fall, there is about 1 week (late October to early November) where the UK has reverted to GMT but the US is still on EDT.
What is 3 PM EST in London time?
3:00 PM EST is 8:00 PM GMT. This is well outside UK business hours. Avoid scheduling meetings this late for London-based colleagues.

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