Convert time from GMT to EST. Enter any time to see the equivalent EST time, compare current GMT and EST times side by side, and find overlapping business hours for calls and meetings.
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 United Kingdom 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 United Kingdom 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).
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.
