Use this GMT to EST time converter to compare United Kingdom and US East Coast time instantly. EST is 5 hours behind GMT, so 9:00 AM GMT becomes 4:00 AM EST and 5:00 PM GMT becomes 12:00 PM EST. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.
Use this GMT to EST converter to compare United Kingdom and US East Coast time, check the 5 hours gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 2:00 PM GMT / 9:00 AM EST.
Converting between Greenwich Mean Time and Eastern Standard Time means accounting for a 5 hours gap — here's how to do it in under 10 seconds with no sign-up.
Pick the date and time in Greenwich Mean Time (UTC +0) that you want to convert. Hit "Now" to load the current GMT time instantly, or use "+1h" to step forward and compare.
The equivalent Eastern Standard Time (UTC -5) time appears immediately. Since EST is 5 hours behind of GMT, most daytime conversions stay on the same calendar day.
Click "Copy Time" to grab the EST result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — useful when Daylight Saving Time changes the gap.
When someone in Universal suggests 2:00 PM GMT, that's 9:00 AM EST. This converter shows the overlap so both sides agree on one slot — no back-and-forth.
Late-night GMT times can land on a different date in EST because of the 5 hours offset. The converter labels "next day" or "previous day" next to the result so you never send a message a day early or miss a deadline.
Daylight Saving adjustments can widen or narrow the GMT–EST gap by an hour. During transition weeks many people get it wrong. This converter pulls the current UTC offsets automatically, so the result is right even on the changeover day.
Product launches, sports matches, and webinars are often announced in GMT. Convert the event time to EST so you know exactly when to tune in — with a 5 hours difference, a morning event in Universal falls during work hours in United States.
Quick-reference conversion table covering every hour of the day at a glance.
Greenwich Mean Time to Eastern Standard Time full day schedule
| Greenwich Mean Time | Eastern Standard Time |
|---|---|
| 12:00 AM |
7:00 PM
(previous day)
|
| 1:00 AM |
8:00 PM
(previous day)
|
| 2:00 AM |
9:00 PM
(previous day)
|
| 3:00 AM |
10:00 PM
(previous day)
|
| 4:00 AM |
11:00 PM
(previous 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
|
| 10:00 AM |
5:00 AM
|
| 11:00 AM |
6:00 AM
|
| 12:00 PM |
7:00 AM
|
| 1:00 PM |
8:00 AM
|
| 2:00 PM |
9:00 AM
|
| 3:00 PM |
10:00 AM
|
| 4:00 PM |
11:00 AM
|
| 5:00 PM |
12:00 PM
|
| 6:00 PM |
1:00 PM
|
| 7:00 PM |
2:00 PM
|
| 8:00 PM |
3:00 PM
|
| 9:00 PM |
4:00 PM
|
| 10:00 PM |
5:00 PM
|
| 11:00 PM |
6:00 PM
|
Reverse of the transatlantic window. GMT is 5 h ahead of EST (4 h ahead of EDT). London-side scheduling of US East meetings defaults to 1-3 PM GMT (8-10 AM ET) — early US morning, mid UK afternoon. The 3-5 PM GMT / 10 AM - 12 PM ET slot is universally accepted; anything after 5 PM GMT starts eating into UK personal evenings.
UK / Ireland / Iceland / Portugal / West Africa. Business hours 9 AM – 5:30 PM GMT typically. Note: London is on GMT in winter, BST (GMT+1) in summer — but "GMT" gets used loosely all year in scheduling contexts. Financial-services London anchors the European trading day.
US East Coast — the reference clock for US business, Wall Street, US law and consulting firms, most Fortune 500 HQ. Business hours 9 AM – 6 PM ET. Note: EST is the winter offset (UTC-5); EDT (UTC-4) is the summer offset — "ET" is the year-round non-committal way to refer to this zone in scheduling apps.
Time gap: EST is 5.0 hours behind GMT (standard-time offsets — daylight-saving flips shift this by an hour twice a year in most northern-hemisphere zones).
GMT to EST is one of the more useful timezone conversions for calls, deadlines, and travel planning. The current gap is 5 hours, which means 9:00 AM GMT becomes 4:00 AM EST and 2:00 PM GMT becomes 9:00 AM EST.
This matters when teams in London and New York need to align business hours, webinars, or customer-support coverage. Use the chart on this page when you want the exact conversion for today instead of relying on manual offset math.
Daylight saving changes can also shift the gap during the year, so a converter is safer than memorizing a fixed difference. That is especially important for recurring meetings and date-sensitive handoffs.
Quick answers about daylight saving time, date changes, business-hour overlap, and the most common scheduling questions between Greenwich Mean Time and Eastern Standard Time.
Explore more GMT conversions for major business and travel corridors. Each page includes a 24-hour chart, time difference summary, and meeting overlap guidance.
Find the time difference from any major zone into Eastern Standard Time. Use these pages when scheduling with United States from a different region.
