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GMT to EST Converter – Convert GMT to Eastern Time

Select your time and date, then see the conversion instantly
Example: When it's 9:00 AM in GMT, it's:
4:00 AMEST (UTC-5)
EST is 5 hours behind GMT during standard time.
Same-day example conversion

Quick Reference: EST is 5 hours behind GMT (EDT during daylight saving).

Common GMT to EST Conversions:
00:00 GMT = 19:00 EST (prev day) | 06:00 GMT = 01:00 EST | 09:00 GMT = 04:00 EST | 12:00 GMT = 07:00 EST | 15:00 GMT = 10:00 EST | 18:00 GMT = 13:00 EST

Related conversions: EST to GMT, UTC to EST, PST to EST, CST to EST, IST to EST, JST to EST

Quick Time Zone Conversions

GMT IST GMT PST GMT UTC GMT CST GMT MST UTC EST PST EST IST PST UTC PST CST EST

Complete Timezone Conversion Tables

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Every popular timezone pair - EST, PST, GMT, IST, JST and more

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Time Offset
−5h
−4h when EST → EDT (Mar–Nov)
Date Line Crossover
Before 5:00 AM GMT
EST shows the previous calendar day
Daylight Saving
GMT: no DST - always UTC+0
EST: Mar–Nov
Best Meeting Window
2:00 PM–5:00 PM GMT
= 9:00 AM–12:00 PM EST

Complete GMT ↔ EST Conversion Table

All 24 hours · Both DST seasons · Best meeting windows marked ★

Best overlap Next day in EST
GMT Time EST Standard Season  UTC+0
Standard  ·  UTC+0 → UTC−5  (−5h)		 EDT Daylight Season  EDT
Daylight  ·  UTC+0 → EDT  (−4h)
12:00 AM (midnight)prev 7:00 PMprev 8:00 PM
1:00 AMprev 8:00 PMprev 9:00 PM
2:00 AMprev 9:00 PMprev 10:00 PM
3:00 AMprev 10:00 PMprev 11:00 PM
4:00 AMprev 11:00 PM12:00 AM
5:00 AM12:00 AM1:00 AM
6:00 AM1:00 AM2:00 AM
7:00 AM2:00 AM3:00 AM
8:00 AM3:00 AM4:00 AM
9:00 AM4:00 AM5:00 AM
10:00 AM5:00 AM6:00 AM
11:00 AM6:00 AM7:00 AM
12:00 PM (noon)7:00 AM8:00 AM
★ 1:00 PM8:00 AM★ 9:00 AM
★ 2:00 PM★ 9:00 AM★ 10:00 AM
★ 3:00 PM★ 10:00 AM★ 11:00 AM
★ 4:00 PM★ 11:00 AM★ 12:00 PM
5:00 PM12:00 PM1:00 PM
6:00 PM1:00 PM2:00 PM
7:00 PM2:00 PM3:00 PM
8:00 PM3:00 PM4:00 PM
9:00 PM4:00 PM5:00 PM
10:00 PM5:00 PM6:00 PM
11:00 PM6:00 PM7:00 PM
★ Best overlap: 2:00 PM–5:00 PM GMT / = 9:00 AM–12:00 PM EST

What is the time difference between GMT and EST?

EST is 5 hours behind GMT. Both regions observe Daylight Saving Time, so the gap stays close to 5 hours year-round. 9:00 AM GMT = 4:00 AM EST. 12:00 PM GMT = 7:00 AM EST. 5:00 PM GMT = 12:00 PM EST.

What is the best time to call from London to New York?

The business hours overlap between GMT and EST runs from 2:00 PM to 5:00 PM GMT (9:00 AM to 12:00 PM EST). Scheduling calls in this window keeps both sides within normal working hours.

Frequently Asked Questions about GMT and EST

EST is 5 hours behind GMT, so to convert mentally, subtract 5 hours to your GMT time. For example: 9:00 AM GMT = 4:00 AM EST. Our converter automatically adjusts for Daylight Saving Time so you always get the right result.

EST (Eastern Standard Time, UTC-5) is 5 hours behind GMT (Greenwich Mean Time, UTC+0) during standard time. For example, 9:00 AM GMT = 4:00 AM EST. During DST periods, this difference changes by 1 hour when one or both zones observe Daylight Saving Time - our converter automatically applies the correct offset for any date you select.

The best overlap for standard business hours (9 AM–5 PM) in both zones is 14:00–17:00 GMT = 09:00–12:00 EST. Schedule recurring calls in this window to keep both sides within normal working hours. Remember to re-check the window in March and November (or March/October for European zones) when DST transitions can shift the overlap by 1 hour.

Yes. GMT (Greenwich Mean Time) observes Daylight Saving Time. Clocks spring forward to BST (UTC+1) on the last Sunday in March, and fall back to GMT on the last Sunday in October. During the DST period, the difference with EST changes by 1 hour. In summer the UK switches to BST (British Summer Time, UTC+1). The GMT label itself never changes; it always means UTC+0. Our converter always uses the current offset for the date you select.

Major cities in the GMT (Greenwich Mean Time, UTC+0) timezone include: London (winter), Dublin (winter), Edinburgh, Reykjavik, Accra, Dakar. These cities switch to BST (UTC+1) from the last Sunday in March to the last Sunday in October.

Major cities in the EST (Eastern Standard Time, UTC-5) timezone include: New York, Boston, Miami, Atlanta, Washington DC, Philadelphia, Toronto. These cities switch to EDT (UTC-4) from the second Sunday in March to the first Sunday in November.

EST is 5 hours behind GMT. The best overlap for business hours is 14:00–17:00 GMT = 09:00–12:00 EST. Always include both local times in calendar invites (for example, "2:00 PM GMT / 9:00 AM EST EST"). Double-check around March and November (or March/October for European zones) when DST transitions can shift the offset by 1 hour. For full scheduling guidance, see our international meeting times guide.

Need more help? Check our complete FAQ section.

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Popular Cities in These Timezones

GMT Timezone Cities:

London, Dublin, Edinburgh, Cardiff

EST Timezone Cities:

New York, Boston, Miami, Atlanta